Result

Request

{
    "to": "\/topics\/topicName",
    "data": {
        "title": "Firebase",
        "message": "Selamat Datang Fahriansyah",
        "icon_url": "http:\/\/virgo13oy.ddns.net:8000\/buku_digital\/android\/gambar\/user\/usertile.jpg",
        "action": null,
        "data": null,
        "action_destination": null
    }
}

Response

Not Found
Error 404