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

{
    "content": {
        "call_id": "12345",
        "version": 0
    },
    "event_id": "$143273582443PhrSn:example.org",
    "origin_server_ts": 1432735824653,
    "room_id": "!jEsUZKDJdhlrceRyVU:example.org",
    "sender": "@example:example.org",
    "type": "m.call.hangup",
    "unsigned": {
        "age": 1234
    }
}