{
  "manageEntity": {
    "action": "Save",
    "entityId": "429352642",
    "entityType": "Track",
    "nonce": "0x2dcd7cda4089e052a9110a2b5528b3a79d07c8defe1675146e53633fcf532969",
    "signature": "0x4e8711828c8f591b6ffa5ca31492de6782bb85ca192fed0dd96622aa7c2e71866fef8058011b55c6b8ab5b3369572c1a34475d584b8f530d4abae78e4a39f6cf1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}