matrix-doc/event-schemas/examples/m.key.verification.request

{
    "type": "m.key.verification.request",
    "content": {
        "from_device": "AliceDevice2",
        "transaction_id": "S0meUniqueAndOpaqueString",
        "methods": [
            "m.sas.v1"
        ],
        "timestamp": 1559598944869
    }
}