{
    "type": "object",
    "properties": {
        "age": {
            "type": "integer"
        },
        "content": {
            "type": "object",
            "properties": {
                "body": {
                    "type": "string"
                },
                "msgtype": {
                    "type": "string"
                }
            }
        },
        "event_id": {
            "type": "string"
        },
        "origin_server_ts": {
            "type": "integer"
        },
        "room_id": {
            "type": "string"
        },
        "sender": {
            "type": "string"
        },
        "type": {
            "type": "string"
        },
        "unsigned": {
            "type": "object",
            "properties": {
                "age": {
                    "type": "integer"
                },
                "membership": {
                    "type": "string"
                },
                "transaction_id": {
                    "type": "string"
                }
            }
        },
        "user_id": {
            "type": "string"
        }
    },
    "version": 4
}