App is run forever

Here is my code.

let body = {
app_id: "5d4fd62b-b9f8-4e41-9a89-7ea3b18af3de",
contents: {"en": "English Message"},
included_segments: ["All"],
large_icon:"https://firebasestorage.googleapis.com/v0/b/apartments-ea9e5.appspot.com/o/logo-1.png?alt=media&token=8839bbd9-f2dd-4b9c-84e0-ed65871a7530",
};

Here is my output.

Screenshot_2017-06-23-09-50-52-37.png480x854 356 KB

after i see the custom icon

Screenshot_2017-06-23-09-51-01-63.png480x854 97.3 KB