{
  "manageEntity": {
    "action": "Save",
    "entityId": "942490970",
    "entityType": "Track",
    "nonce": "0xf4be7a2dcdb57249d671008f4f3f53c9579f1ae4b5e32b8b6d7953df75adb0ea",
    "signature": "0xe1202913d9720c57715d0540c2abccfc7eeccfdbeb3a72f3f2c359ced9cb1ee05642b2efbd430de61bd00b52cf769c07f86eeea34e7cf39171136d9dc1a3e8101c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}