{
  "manageEntity": {
    "action": "Save",
    "entityId": "1893936378",
    "entityType": "Track",
    "nonce": "0xfc858f9632fa87a85914e12fe24e710bec7b9981a68c8e3a4f447848446784eb",
    "signature": "0x901d9e55f9b5b100bd5b50a3c7095623b898c5212f87e598573b93b22d37f08a78f6f3ffba7bb7e0a02ac8bc4a557924655dd08ec710b501f67ee28410720b891c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}