Notification not received

[gundogduyakici]

I'm adding records to the back-end. There is a notification before. No now notifications. What is the reason of this?
I checked. Registration added. The associated user is correct. (assigned_user_id)

$service = $this->getRecordService();

if ($entity = $service->createEntity($data)) {
    return $entity->getValueMap();
}

throw new Error();