{
  "manageEntity": {
    "action": "Save",
    "entityId": "491356935",
    "entityType": "Track",
    "nonce": "0x1110c8e4cffa73a7b2628c54644ce7fc2df87f1b125fd1b241e96b25b12998c9",
    "signature": "0x7f03840ff012d583998196a36f41821761df0580540e727da27c5cba719e20136b5e94f9233c12171c6ed0256db46b7b44a228da4eff90e801a8a56e69e264741b",
    "signer": "0x9436FA87F6c8C3aa9e0F0fc7960566dEeB9e23d4",
    "userId": "2047015"
  }
}