{
  "manageEntity": {
    "action": "Save",
    "entityId": "332019282",
    "entityType": "Track",
    "nonce": "0x6c77a7c6a777a623dd223d1e85a2a51b926d73fd697061d97866581d9dd67616",
    "signature": "0xd0a693dded582a5e835725b90c62ae1b0f2c04bcaf844a98f63f1636b465601b0f8bf62e509477318d00df5111f31ea6819828428e74cc5e098d49b8bfc95a781c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}