matrix-nio/tests/data/events/guest_access.json

{
    "content": {
        "guest_access": "can_join"
    },
    "event_id": "$151957878229oehdx:localhost",
    "origin_server_ts": 1519578782190,
    "sender": "@example:localhost",
    "state_key": "",
    "type": "m.room.guest_access",
    "unsigned": {
      "age": 1392989711
    }
}