diff --git a/app/assets/javascripts/admin/addon/adapters/theme.js b/app/assets/javascripts/admin/addon/adapters/theme.js
index 66f901b2cdb..f6d6fa4bb8a 100644
--- a/app/assets/javascripts/admin/addon/adapters/theme.js
+++ b/app/assets/javascripts/admin/addon/adapters/theme.js
@@ -1,4 +1,5 @@
 import RestAdapter from "discourse/adapters/rest";
+import ThemeSettings from "admin/models/theme-settings";
 
 export default class Theme extends RestAdapter {
   jsonMode = true;
@@ -8,9 +9,11 @@ export default class Theme extends RestAdapter {
 
   afterFindAll(results) {
     let map = {};
+
     results.forEach((theme) => {
       map[theme.id] = theme;
     });
+
     results.forEach((theme) => {
       let mapped = theme.get("child_themes") || [];
       mapped = mapped.map((t) => map[t.id]);
@@ -19,7 +22,15 @@ export default class Theme extends RestAdapter {
       let mappedParents = theme.get("parent_themes") || [];
       mappedParents = mappedParents.map((t) => map[t.id]);
       theme.set("parentThemes", mappedParents);
+
+      if (theme.settings) {
+        theme.set(
+          "settings",
+          theme.settings.map((setting) => ThemeSettings.create(setting))
+        );
+      }
     });
+
     return results;
   }
 }
diff --git a/app/assets/javascripts/admin/addon/components/theme-setting-editor.js b/app/assets/javascripts/admin/addon/components/theme-setting-editor.js
index e28bbc95fbd..5c8e9734356 100644
--- a/app/assets/javascripts/admin/addon/components/theme-setting-editor.js
+++ b/app/assets/javascripts/admin/addon/components/theme-setting-editor.js
@@ -1,17 +1,10 @@
-import { ajax } from "discourse/lib/ajax";
-import { url } from "discourse/lib/computed";
 import SiteSettingComponent from "./site-setting";
 
 export default class extends SiteSettingComponent {
-  @url("model.id", "/admin/themes/%@/setting") updateUrl;
-
   _save() {
-    return ajax(this.updateUrl, {
-      type: "PUT",
-      data: {
-        name: this.setting.setting,
-        value: this.get("buffered.value"),
-      },
-    });
+    return this.setting.updateSetting(
+      this.model.id,
+      this.get("buffered.value")
+    );
   }
 }
diff --git a/app/assets/javascripts/admin/addon/components/theme-settings-editor.js b/app/assets/javascripts/admin/addon/components/theme-settings-editor.js
index b88bb637569..7296fbf03ac 100644
--- a/app/assets/javascripts/admin/addon/components/theme-settings-editor.js
+++ b/app/assets/javascripts/admin/addon/components/theme-settings-editor.js
@@ -2,7 +2,6 @@ import Component from "@glimmer/component";
 import { tracked } from "@glimmer/tracking";
 import { action } from "@ember/object";
 import { service } from "@ember/service";
-import { ajax } from "discourse/lib/ajax";
 import I18n from "discourse-i18n";
 
 export default class ThemeSettingsEditor extends Component {
@@ -52,6 +51,7 @@ export default class ThemeSettingsEditor extends Component {
     if (!this.theme) {
       return null;
     }
+
     return this.theme.settings.map((setting) => ({
       setting: setting.setting,
       value: setting.value,
@@ -86,11 +86,14 @@ export default class ThemeSettingsEditor extends Component {
     this.saving = true;
     this.errors = [];
     this.success = "";
+
     if (!this.editedContent) {
       // no changes.
       return;
     }
+
     let newSettings = "";
+
     try {
       newSettings = JSON.parse(this.editedContent);
     } catch (e) {
@@ -104,6 +107,7 @@ export default class ThemeSettingsEditor extends Component {
       this.saving = false;
       return;
     }
+
     if (!this.validateSettingsKeys(newSettings)) {
       this.errors = [
         ...this.errors,
@@ -119,14 +123,17 @@ export default class ThemeSettingsEditor extends Component {
     const originalNames = this.theme
       ? this.theme.settings.map((setting) => setting.setting)
       : [];
+
     const newNames = newSettings.map((setting) => setting.setting);
     const deletedNames = originalNames.filter(
       (originalName) => !newNames.find((newName) => newName === originalName)
     );
+
     const addedNames = newNames.filter(
       (newName) =>
         !originalNames.find((originalName) => originalName === newName)
     );
+
     if (deletedNames.length) {
       this.errors = [
         ...this.errors,
@@ -136,6 +143,7 @@ export default class ThemeSettingsEditor extends Component {
         },
       ];
     }
+
     if (addedNames.length) {
       this.errors = [
         ...this.errors,
@@ -151,41 +159,49 @@ export default class ThemeSettingsEditor extends Component {
       return;
     }
 
-    const changedSettings = newSettings.filter((newSetting) => {
+    const changedSettings = [];
+
+    newSettings.forEach((newSetting) => {
       const originalSetting = this.theme.settings.find(
         (_originalSetting) => _originalSetting.setting === newSetting.setting
       );
-      return originalSetting.value !== newSetting.value;
+
+      if (originalSetting.value !== newSetting.value) {
+        changedSettings.push({
+          originalSetting,
+          value: newSetting.value,
+        });
+      }
     });
-    for (let setting of changedSettings) {
+
+    for (let changedSetting of changedSettings) {
       try {
-        await this.saveSetting(this.theme.id, setting);
+        await this.saveSetting(this.theme.id, changedSetting);
       } catch (err) {
         const errorObjects = JSON.parse(err.jqXHR.responseText).errors.map(
           (error) => ({
-            setting: setting.setting,
+            setting: changedSetting.originalSetting.setting,
             errorMessage: error,
           })
         );
+
         this.errors = [...this.errors, ...errorObjects];
       }
     }
+
     if (this.errors.length === 0) {
       this.editedContent = null;
     }
+
     this.saving = false;
     this.dialog.cancel();
     this.customizeThemeShowController.send("routeRefreshModel");
   }
 
-  async saveSetting(themeId, setting) {
-    const updateUrl = `/admin/themes/${themeId}/setting`;
-    return await ajax(updateUrl, {
-      type: "PUT",
-      data: {
-        name: setting.setting,
-        value: setting.value,
-      },
-    });
+  async saveSetting(themeId, changedSetting) {
+    return await changedSetting.originalSetting.updateSetting(
+      themeId,
+      changedSetting.value
+    );
   }
 }
diff --git a/app/assets/javascripts/admin/addon/controllers/admin-customize-themes-show.js b/app/assets/javascripts/admin/addon/controllers/admin-customize-themes-show.js
index b271dafdd11..c493d0b8859 100644
--- a/app/assets/javascripts/admin/addon/controllers/admin-customize-themes-show.js
+++ b/app/assets/javascripts/admin/addon/controllers/admin-customize-themes-show.js
@@ -6,6 +6,7 @@ import {
   mapBy,
   match,
   notEmpty,
+  readOnly,
 } from "@ember/object/computed";
 import { service } from "@ember/service";
 import { popupAjaxError } from "discourse/lib/ajax-error";
@@ -43,6 +44,7 @@ export default class AdminCustomizeThemesShowController extends Controller {
   @notEmpty("settings") hasSettings;
   @notEmpty("translations") hasTranslations;
   @match("model.remote_theme.remote_url", /^http(s)?:\/\//) sourceIsHttp;
+  @readOnly("model.settings") settings;
 
   @discourseComputed("model.component", "model.remote_theme")
   showCheckboxes() {
@@ -146,11 +148,6 @@ export default class AdminCustomizeThemesShowController extends Controller {
     return `admin.customize.theme.convert_${type}_tooltip`;
   }
 
-  @discourseComputed("model.settings")
-  settings(settings) {
-    return settings.map((setting) => ThemeSettings.create(setting));
-  }
-
   @discourseComputed("model.translations")
   translations(translations) {
     return translations.map((setting) =>
diff --git a/app/assets/javascripts/admin/addon/models/theme-settings.js b/app/assets/javascripts/admin/addon/models/theme-settings.js
index f61da7c2c0e..9b6b5725c39 100644
--- a/app/assets/javascripts/admin/addon/models/theme-settings.js
+++ b/app/assets/javascripts/admin/addon/models/theme-settings.js
@@ -1,4 +1,19 @@
 import EmberObject from "@ember/object";
+import { ajax } from "discourse/lib/ajax";
 import Setting from "admin/mixins/setting-object";
 
-export default class ThemeSettings extends EmberObject.extend(Setting) {}
+export default class ThemeSettings extends EmberObject.extend(Setting) {
+  updateSetting(themeId, newValue) {
+    if (this.objects_schema) {
+      newValue = JSON.stringify(newValue);
+    }
+
+    return ajax(`/admin/themes/${themeId}/setting`, {
+      type: "PUT",
+      data: {
+        name: this.setting,
+        value: newValue,
+      },
+    });
+  }
+}
diff --git a/lib/theme_settings_manager/objects.rb b/lib/theme_settings_manager/objects.rb
index 5c53f28c19e..71b9a9d0643 100644
--- a/lib/theme_settings_manager/objects.rb
+++ b/lib/theme_settings_manager/objects.rb
@@ -6,6 +6,7 @@ class ThemeSettingsManager::Objects < ThemeSettingsManager
   end
 
   def value=(objects)
+    objects = JSON.parse(objects) if objects.is_a?(::String)
     ensure_is_valid_value!(objects)
     record = has_record? ? update_record!(json_value: objects) : create_record!(json_value: objects)
     theme.reload
diff --git a/spec/requests/admin/themes_controller_spec.rb b/spec/requests/admin/themes_controller_spec.rb
index 4f24080cff1..6c6a89ed924 100644
--- a/spec/requests/admin/themes_controller_spec.rb
+++ b/spec/requests/admin/themes_controller_spec.rb
@@ -1040,7 +1040,7 @@ RSpec.describe Admin::ThemesController do
   end
 
   describe "#update_single_setting" do
-    let(:theme) { Fabricate(:theme) }
+    fab!(:theme)
 
     before do
       theme.set_field(target: :settings, name: :yaml, value: "bg: red")
@@ -1063,6 +1063,38 @@ RSpec.describe Admin::ThemesController do
         expect(user_history.action).to eq(UserHistory.actions[:change_theme_setting])
       end
 
+      it "should be able to update a theme setting of `objects` typed" do
+        SiteSetting.experimental_objects_type_for_theme_settings = true
+
+        field =
+          theme.set_field(
+            target: :settings,
+            name: "yaml",
+            value: File.read("#{Rails.root}/spec/fixtures/theme_settings/objects_settings.yaml"),
+          )
+
+        theme.save!
+
+        put "/admin/themes/#{theme.id}/setting.json",
+            params: {
+              name: "objects_setting",
+              value: [
+                { name: "new_section", links: [{ name: "new link", url: "https://some.url.com" }] },
+              ].to_json,
+            }
+
+        expect(response.status).to eq(200)
+
+        expect(theme.settings[:objects_setting].value).to eq(
+          [
+            {
+              "name" => "new_section",
+              "links" => [{ "name" => "new link", "url" => "https://some.url.com" }],
+            },
+          ],
+        )
+      end
+
       it "should clear a theme setting" do
         put "/admin/themes/#{theme.id}/setting.json", params: { name: "bg" }
         theme.reload
diff --git a/spec/system/admin_customize_themes_spec.rb b/spec/system/admin_customize_themes_spec.rb
index 1429a9ae873..339b47c191a 100644
--- a/spec/system/admin_customize_themes_spec.rb
+++ b/spec/system/admin_customize_themes_spec.rb
@@ -110,5 +110,43 @@ describe "Admin Customize Themes", type: :system do
         "/admin/customize/themes/#{theme.id}/schema/objects_setting",
       )
     end
+
+    it "allows an admin to edit a theme setting of objects type via the settings editor" do
+      visit "/admin/customize/themes/#{theme.id}"
+
+      theme_settings_editor = admin_customize_themes_page.click_theme_settings_editor_button
+
+      theme_settings_editor.fill_in(<<~SETTING)
+      [
+        {
+          "setting": "objects_setting",
+          "value": [
+            {
+              "name": "new section",
+              "links": [
+                {
+                  "name": "new link",
+                  "url": "https://example.com"
+                }
+              ]
+            }
+          ]
+        }
+      ]
+      SETTING
+
+      theme_settings_editor.save
+
+      try_until_success do
+        expect(theme.reload.settings[:objects_setting].value).to eq(
+          [
+            {
+              "links" => [{ "name" => "new link", "url" => "https://example.com" }],
+              "name" => "new section",
+            },
+          ],
+        )
+      end
+    end
   end
 end
diff --git a/spec/system/page_objects/components/ace_editor.rb b/spec/system/page_objects/components/ace_editor.rb
index d7aee298524..cbb29db863b 100644
--- a/spec/system/page_objects/components/ace_editor.rb
+++ b/spec/system/page_objects/components/ace_editor.rb
@@ -9,6 +9,9 @@ module PageObjects
       end
 
       def fill_input(content)
+        # Clear the input before filling it in because capybara's fill_in method doesn't seem to replace existing content
+        # unless the content is a blank string.
+        editor_input.fill_in(with: "")
         editor_input.fill_in(with: content)
         self
       end
@@ -18,7 +21,10 @@ module PageObjects
       end
 
       def editor_input
-        find(".ace-wrapper .ace_text-input", visible: false)
+        find(".ace-wrapper .ace:not(.hidden)", visible: true).find(
+          ".ace_text-input",
+          visible: false,
+        )
       end
     end
   end
diff --git a/spec/system/page_objects/components/admin_theme_settings_editor.rb b/spec/system/page_objects/components/admin_theme_settings_editor.rb
new file mode 100644
index 00000000000..631d44b1391
--- /dev/null
+++ b/spec/system/page_objects/components/admin_theme_settings_editor.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+module PageObjects
+  module Components
+    class AdminThemeSettingsEditor < Base
+      def fill_in(settings)
+        editor.fill_input(settings)
+        self
+      end
+
+      def save
+        click_button(I18n.t("admin_js.admin.customize.theme.save"))
+        self
+      end
+
+      private
+
+      def editor
+        @editor ||= within(".settings-editor") { AceEditor.new }
+      end
+    end
+  end
+end
diff --git a/spec/system/page_objects/pages/admin_customize_themes.rb b/spec/system/page_objects/pages/admin_customize_themes.rb
index 1ce116edc6a..bd255a24092 100644
--- a/spec/system/page_objects/pages/admin_customize_themes.rb
+++ b/spec/system/page_objects/pages/admin_customize_themes.rb
@@ -42,6 +42,11 @@ module PageObjects
       def click_edit_objects_theme_setting_button(setting_name)
         find(".theme-setting[data-setting=\"#{setting_name}\"] .setting-value-edit-button").click
       end
+
+      def click_theme_settings_editor_button
+        click_button(I18n.t("admin_js.admin.customize.theme.settings_editor"))
+        PageObjects::Components::AdminThemeSettingsEditor.new
+      end
     end
   end
 end