fix subscriptionController

lib/Controller/SubscriptionController.php

@@ -85,7 +85,7 @@ class SubscriptionController extends Controller {
 	 */
 	public function set($pollId, $token, $subscribed) {
 		try {
-			return new DataResponse($this->subscriptionService->set($pollId, $token, $subscribed), Http::STATUS_OK);
+			return new DataResponse(['subscribed' => $this->subscriptionService->set($pollId, $token, $subscribed)], Http::STATUS_OK);
 		} catch (NotAuthorizedException $e) {
 			return new DataResponse(['error' => $e->getMessage()], $e->getStatus());
 		}