{
  "manageEntity": {
    "action": "Save",
    "entityId": "1923958504",
    "entityType": "Track",
    "nonce": "0xe752fb79d1b1d3aeb206f226bd13b286e69ce051e0220f976aff531e96bb5672",
    "signature": "0x7d966e7c3ee14b5b50f3630203457127da65a26f5db8bc124007d974f33990fd612105502349d8d498473c7d43309bcb328aad304438821d0aaf0b61612d11b31b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}