matrix-spec/api/server-server/examples/server_key.json

{
    "server_name": "example.org",
    "verify_keys": {
        "ed25519:auto2": {
        "key": "Base+64+Encoded+Signature+Verification+Key"
        }
    },
    "old_verify_keys": {
        "ed25519:auto1": {
        "expired_ts": 922834800000,
            "key": "Base+64+Encoded+Old+Verify+Key"
        }
    },
    "signatures": {
        "example.org": {
        "ed25519:auto2": "Base+64+Encoded+Signature"
        }
    },
    "tls_fingerprints": [{
        "sha256": "Base+64+Encoded+SHA-256-Fingerprint"
    }],
    "valid_until_ts": 1052262000000
}