{
  "manageEntity": {
    "action": "Save",
    "entityId": "112456644",
    "entityType": "Track",
    "nonce": "0x9b537e3c05477e81efd069f0cdd65f7847c92e53874c6d7be729c04eccbe6c83",
    "signature": "0x50a6c00ea5775b845f6f729cef02b0d8e1380f01fb606ff158f3812b12727e64714cdfa1d8a991126b21cfbaa0e7813a1974db20c027b218c3e1aa69bc3376391c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}