{
  "manageEntity": {
    "action": "Save",
    "entityId": "1771462487",
    "entityType": "Track",
    "nonce": "0x677bf404d55b20697088094399abc03ecba3c1fa6220e05915fc9db23289faef",
    "signature": "0x3a462e23684aaf4544c5dc89153debd57deebab09d2f604e94397d95a7d687c979198d7d6eb7a7fc39b5a81a639abcbe027a300ce7b66c12876589ca344d6ee61c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}