at the end of the day, it was inevitable

src/ApiBundle/Entity/ManageableEntityInterface.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace ApiBundle\Entity;
+
+use AppBundle\Entity\EntityInterface;
+
+/**
+ * Interface ManageableEntityInterface
+ * Interface for entities which can be managed by api methods.
+ *
+ * @package ApiBundle\Entity
+ */
+interface ManageableEntityInterface extends EntityInterface
+{
+
+    /**
+     * Return fqcn of form used for creating this entity.
+     *
+     * @return string
+     */
+    public function getCreateFormClass();
+
+    /**
+     * Return fqcn of form used for updating this entity.
+     *
+     * @return string
+     */
+    public function getUpdateFormClass();
+}