{"keys":[{"kid":"afd037f8a81fcd63","alg":"EdDSA","use":"sig","kty":"OKP","crv":"Ed25519","x":"xpQpE_8XMAnyar0mlCcAzg1WkGBgC7bMqdJaeQ3IpDI"}],"ephemeral":false,"how":"A party record's signature is Ed25519 over the UTF-8 bytes of its `record` line; the certificate's is over the UTF-8 bytes of `JSON.stringify` of the certificate with `certificate_sig` removed. Signatures read `ed25519:<kid>:<hex>`."}