{
  "$ref": "core/room_event.json",
  "type": "m.room.message",
  "content": {
    "body": "filename.jpg",
    "info": {
        "h": 398,
        "w": 394,
        "mimetype": "image/jpeg",
        "size": 31037
    },
    "url": "mxc://example.org/JWEIFJgwEIhweiWJE",
    "msgtype": "m.image"
  }
}
