{
    "content": {
        "body": "This is a test message",
        "format": "org.matrix.custom.html",
        "formatted_body": "This is a test message <b>with HTML!</b>",
        "m.mentions": {
            "user_ids": [
                "@emma:rory.gay"
            ]
        },
        "msgtype": "m.text"
    },
    "event_id": "$qBmS2SyNAA-ODcOZpAd_RRfApzXuMmy0VHsCqnMebzI",
    "origin_server_ts": 1717100265714,
    "sender": "@user:example.xyz",
    "type": "m.room.message",
    "unsigned": null
}