urls

app/views/admin/communication/blocks/content/_editor.html.erb

 <div  class="js-content-editor"
-      data-sort-url="<%= reorder_admin_communication_blocks_path %>">
+      data-sort-headings-url="<%= reorder_admin_communication_blocks_path %>">
+      data-sort-blocks-url="<%= reorder_admin_communication_headings_path %>">
   <div  class=" content-editor__elements
                 content-editor__elements__root
                 js-content-editor-sortable-container"

config/routes/admin/communication.rb

@@ -60,7 +60,11 @@ namespace :communication do
   end
   resources :blocks, controller: 'blocks', except: [:index] do
     collection do
-      resources :headings, controller: 'blocks/headings'
+      resources :headings, controller: 'blocks/headings' do
+        collection do
+          post :reorder
+        end
+      end
       post :reorder
     end
     member do