{
 "protected": base64url({
      "typ":"JWT",
  "alg":"ES256",
  "x5u":"https://authority.example.org/cert"
     }),
 "payload": base64url({
      "iss":"https://authority.example.org/authz",
  "exp":1300819380,
  "jti":"id6098364921",
  "atc":{"tktype":"TnAuthList","tkvalue":"F83n2a...avn27DN3==",
  "fingerprint":"SHA256 56:3E:CF:AE:83:CA:4D:15:B0:29:FF:1B:71:D3:
  BA:B9:19:81:F8:50:9B:DF:4A:D4:39:72:E2:B1:F0:B9:38:E3"}
     }),
  "signature": "9cbg5JO1Gf5YLjjz...SpkUfcdPai9uVYYQ"
     }