Use for RichNotification & custom notification :
{ "to" : "cCKp60wctEDNvgtU_mjSDV:APA91bHiEfj9ThoTNe7Zhz-RZC0dA6Xt3Xst61lsVKcY8VV-gX8jh-5njtF7UzWDB4G49ESF2Xt6EkZI0_3jXV8qcYwLBL0aHbagvud6NlB1OoZxw-J6ApWuJYoP2cBErpPcuvYeakC3", "content_available" : true, "mutable_content": true, "priority" : "high", "data": { "message": "Offer!", "attachment" : "http://iphoneislam.com/wp-content/uploads/2016/10/Zamen_iOS10_1-590x332.jpg", "media_type":"image", "type": "Category" }, "notification": { "body": "Enter your message", "sound": "Sound1.caf", "title":"sfshfuksgfksfgksfgksfs", "click_action": "myNotificationCategory" }
}