apnmsg.json

{
    "aps": {
        "content-available" : 1,
        "alert": {
            "title": title,
            "body": body
        },
        "badge": badgeCount,
        "sound": "bingbong.aiff"
    },
    "meta": "{'notifId':'<someId>','senderId':'<someSenderId>'}", //this is for hidden data
}