matrix-rust-sdk/test_data/events/reaction.json

{
    "content": {
        "m.relates_to": {
            "event_id": "$MDitXXXXXXuBlpP7S6c6XXXXXXXC2HqZ3peV1NrV4PKA",
            "key": "👍",
            "rel_type": "m.annotation"
        }
    },
    "event_id": "$QZn9xEXXXXXfd2tAGFH-XXgsffZlVMobk47Tl5Lpdtg",
    "origin_server_ts": 1590275813161,
    "sender": "@devinr528:matrix.org",
    "type": "m.reaction",
    "unsigned": {
        "age": 85
    }
}