{
    "$ref": "event.json",
    "event_id": "$143273582443PhrSn:domain.com",
    "room_id": "!jEsUZKDJdhlrceRyVU:domain.com",
    "sender": "@example:domain.com",
    "origin_server_ts": 1432735824653,
    "unsigned": {
      "age": 1234
    }
}