{
 "to" : "/topics/testing",
 "notification" : {
     "title": "Promo Tahun Baru",
     "body" : "First Notification",
     "icon" : "ic_stat_logo",
     "sound" : "default",
     "click_action" : ".ui.notification.NotificationActivity"
 },
 "data" : {
     "title": "Promo Tahun Baru",
     "body" : "First Notification",
     "image" : "https://www.testing.com/static/images/mobile/d5080f9153ed9c43d01ee75f8a3307cd.gif"
 }
}