{
  "manageEntity": {
    "action": "Save",
    "entityId": "594775",
    "entityType": "Track",
    "nonce": "0x24b64cdc4586649ec460499270ddb1d645cb0bd9f5443fe3635551e4e61cec98",
    "signature": "0xba191791b24593cddaea483b222f79d7a0d94e5c12eba41978ef3536581de7e858e5cb0fa8395f1bab08e30bb2b2a5942a240936628ffd8fd29450f44e0d60451b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}