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

{
    "content": {
        "body": "foo",
        "m.dotted": {
            "key": "bar"
        }
    },
    "event_id": "!test:example.org",
    "origin_server_ts": 0,
    "sender": "@alice:example.org",
    "type": "m.flatten_test"
}