{
  "manageEntity": {
    "action": "Save",
    "entityId": "267952",
    "entityType": "Track",
    "nonce": "0xce7a75e17a7ebf0ada9772c7b2689d157e6b81f31b92663f577ecda6f34cff7c",
    "signature": "0x75024c50a8be78af093e5034c39d1762095285c80b8d0fe1caa297a4d73ea85113ed34652203e0afe14d9cad000ac22521d26d569821a00aba59abd4b9daab131b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}