{
  "manageEntity": {
    "action": "Save",
    "entityId": "147305",
    "entityType": "Track",
    "nonce": "0x84349e53ee4af61e784a7ac78547b0639bf382c775bf0804e078e514e44d3b31",
    "signature": "0x3f1536e8d0d0af91f6d978d540f9a8ad82273400561f4ec564e5c198c7eb151d099c1ec1f82e95a3a4cd9cf93895113c9924ded38ead2fd18d6390a9c1a81b4f1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}