matrix-rust-sdk/tests/data/events/redaction.json

{
    "content": {
        "reason": "😀"
    },
    "event_id": "$151957878228ssqrJ:localhost",
    "origin_server_ts": 1519578782185,
    "sender": "@example:localhost",
    "type": "m.room.redaction",
    "redacts": "$151957878228ssqrj:localhost"
}