public function postAction(Request $request)
    {
        /**
         * @var $em ApiEntityManager
         */
        $em = $this->getDoctrine()->getManager();

        $data = json_decode($request->getContent(), true);
        $entity = $em->createEntity($this->entityClassName());

        $form = $this->createForm($this->formClassName(), $entity, [
            "method" => $request->getMethod(),
        ]);

        $form->submit($data);

        if ($form->isValid()) {
            $em = $this->getDoctrine()->getManager();
            $em->persist($entity);
            $em->flush();

            return $entity;
        }

        return FOSView::create([
            'errors' => $form->getErrors()
        ], Response::HTTP_INTERNAL_SERVER_ERROR);
    }