{
  "manageEntity": {
    "action": "Save",
    "entityId": "1987702442",
    "entityType": "Track",
    "nonce": "0xccd6ca4ff48b430ffa77ed6b4dd75afa59101c39a099fc16baef909aa0e81da5",
    "signature": "0x5a2996d6d8ae25abe6077194a62db224dbb8ac39c80b7d15dd71086f3825d36b6f3b61cca9296f6cf3cb2b6a6c60fb580d43258bac35373df45df0637ad233ba1c",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}