diff --git a/src/api/endpoints/class-tainacan-rest-collections-controller.php b/src/api/endpoints/class-tainacan-rest-collections-controller.php
index 25cbbfd5c..7532fe72f 100644
--- a/src/api/endpoints/class-tainacan-rest-collections-controller.php
+++ b/src/api/endpoints/class-tainacan-rest-collections-controller.php
@@ -148,9 +148,28 @@ class REST_Collections_Controller extends REST_Controller {
 		        $item_arr = $item->__toArray();
 
 		        if ( $request['context'] === 'edit' ) {
+		        	$moderators_ids = $item_arr['moderators_ids'];
+
+		        	$moderators = [];
+
+		        	foreach ($moderators_ids as $id){
+		        		$user_data = get_userdata($id);
+
+		        		if($user_data){
+		        			$user['name'] = $user_data->display_name;
+					        //$user['roles'] = $user_data->roles;
+					        $user['id'] = $user_data->ID;
+
+					        $moderators[] = $user;
+				        }
+			        }
+
+			        $item_arr['moderators'] = $moderators;
+
 			        $item_arr['current_user_can_edit'] = $item->can_edit();
 		        }
 
+		        unset($item_arr['moderators_ids']);
 	        } else {
         		$attributes_to_filter = $request['fetch_only'];
 
diff --git a/src/classes/entities/class-tainacan-collection.php b/src/classes/entities/class-tainacan-collection.php
index ad6708f7e..5c3cac850 100644
--- a/src/classes/entities/class-tainacan-collection.php
+++ b/src/classes/entities/class-tainacan-collection.php
@@ -31,6 +31,7 @@ class Collection extends Entity {
         $enable_cover_page,
         $cover_page_id,
         $header_image_id,
+	    $header_image,
         $moderators_ids;
 
     /**
@@ -68,7 +69,7 @@ class Collection extends Entity {
 		$array_collection = parent::__toArray();
 
 		$array_collection['featured_image']  = $this->get_featured_image();
-		$array_collection['featured_img_id'] = $this->get_featured_img_id();
+		$array_collection['header_image']    = $this->get_header_image();
 		$array_collection['author_name']     = $this->get_author_name();
 
 		return $array_collection;
@@ -207,6 +208,13 @@ class Collection extends Entity {
 		return get_the_post_thumbnail_url( $this->get_id(), 'full' );
 	}
 
+	/**
+	 * @return false|string
+	 */
+	function get_header_image(){
+		return wp_get_attachment_url( $this->get_header_image_id() );
+	}
+
 	/**
 	 * @param $id
 	 */
diff --git a/src/classes/repositories/class-tainacan-repository.php b/src/classes/repositories/class-tainacan-repository.php
index f8911c881..22a1b076b 100644
--- a/src/classes/repositories/class-tainacan-repository.php
+++ b/src/classes/repositories/class-tainacan-repository.php
@@ -117,7 +117,6 @@ abstract class Repository {
 			}
 
 			$post_t = $collection->get_db_identifier();
-
 			$obj->WP_Post->post_type = $post_t;
 		}
 
@@ -134,50 +133,9 @@ abstract class Repository {
 			}
 		}
 
-		if ( method_exists( $obj, 'get_featured_img_id' ) ) {
-			if ( ! get_post_thumbnail_id( $obj->WP_Post->ID ) ) {
-				// was added a thumbnail
+		$diffs = $this->insert_thumbnail( $obj, $diffs );
 
-				$settled = set_post_thumbnail( $obj->WP_Post, (int) $obj->get_featured_img_id() );
-
-				if ( $settled ) {
-
-					$thumbnail_url = get_the_post_thumbnail_url( $obj->WP_Post->ID );
-
-					$diffs['featured_image'] = [
-						'new'             => $thumbnail_url,
-						'old'             => '',
-						'diff_with_index' => 0,
-					];
-
-				}
-
-			} else {
-
-				// was update a thumbnail
-
-				$old_thumbnail = get_the_post_thumbnail_url( $obj->WP_Post->ID );
-
-				$fid = $obj->get_featured_img_id();
-
-				if(!$fid){
-					$settled = delete_post_thumbnail($obj->WP_Post);
-				} else {
-					$settled = set_post_thumbnail( $obj->WP_Post, (int) $fid );
-				}
-
-				if ( $settled ) {
-
-					$thumbnail_url = get_the_post_thumbnail_url( $obj->WP_Post->ID );
-
-					$diffs['featured_image'] = [
-						'new'             => $thumbnail_url,
-						'old'             => $old_thumbnail,
-						'diff_with_index' => 0,
-					];
-				}
-			}
-		}
+		// TODO: Logs for header image insert and update
 
 		do_action( 'tainacan-insert', $obj, $diffs, $is_update );
 		do_action( 'tainacan-insert-' . $obj->get_post_type(), $obj );
@@ -741,12 +699,66 @@ abstract class Repository {
 			}
 		}
 
-		unset($diff['id'], $diff['collection_id'], $diff['author_id'], $diff['creation_date']);
+		unset($diff['id'], $diff['collection_id'], $diff['author_id'], $diff['creation_date'], $diff['featured_img_id']);
 		$diff = apply_filters( 'tainacan-entity-diff', $diff, $new, $old );
 
 		return $diff;
 	}
 
+	/**
+	 * @param $obj
+	 * @param $diffs
+	 *
+	 * @return mixed
+	 */
+	protected function insert_thumbnail( $obj, $diffs ) {
+		if ( method_exists( $obj, 'get_featured_img_id' ) ) {
+			if ( ! get_post_thumbnail_id( $obj->WP_Post->ID ) ) {
+				// was added a thumbnail
+
+				$settled = set_post_thumbnail( $obj->WP_Post, (int) $obj->get_featured_img_id() );
+
+				if ( $settled ) {
+
+					$thumbnail_url = get_the_post_thumbnail_url( $obj->WP_Post->ID );
+
+					$diffs['featured_image'] = [
+						'new'             => $thumbnail_url,
+						'old'             => '',
+						'diff_with_index' => 0,
+					];
+
+				}
+
+			} else {
+
+				// was update a thumbnail
+
+				$old_thumbnail = get_the_post_thumbnail_url( $obj->WP_Post->ID );
+
+				$fid = $obj->get_featured_img_id();
+
+				if ( ! $fid ) {
+					$settled = delete_post_thumbnail( $obj->WP_Post );
+				} else {
+					$settled = set_post_thumbnail( $obj->WP_Post, (int) $fid );
+				}
+
+				if ( $settled ) {
+
+					$thumbnail_url = get_the_post_thumbnail_url( $obj->WP_Post->ID );
+
+					$diffs['featured_image'] = [
+						'new'             => $thumbnail_url,
+						'old'             => $old_thumbnail,
+						'diff_with_index' => 0,
+					];
+				}
+			}
+		}
+
+		return $diffs;
+	}
 }
 
 ?>