{
    "$ref": "unsigned_pdu_base.json",
    "hashes": {
        "sha256": "thishashcoversallfieldsincasethisisredacted"
    },
    "signatures": {
        "example.com": {
            "ed25519:key_version:": "these86bytesofbase64signaturecoveressentialfieldsincludinghashessocancheckredactedpdus"
        }
    },
    "auth_events": [
        "$base64encodedeventid",
        "$adifferenteventid"
    ],
    "prev_events": [
        "$base64encodedeventid",
        "$adifferenteventid"
    ],
    "redacts": "$some/old+event"
}