matrix-spec/data/api/server-server/examples/components/pdu_base.json

{
    "room_id": "!UcYsUzyxTGDxLBEvLy:example.org",
    "sender": "@alice:example.com",
    "origin_server_ts": 1404838188000,
    "depth": 12,
    "type": "m.room.message",
    "content": {
        "key": "value"
    },
    "hashes": {
        "sha256": "thishashcoversallfieldsincasethisisredacted"
    },
    "signatures": {
        "example.com": {
            "ed25519:key_version": "these86bytesofbase64signaturecoveressentialfieldsincludinghashessocancheckredactedpdus"
        }
    },
    "unsigned": {
        "age": 4612
    }
}