{
  "manageEntity": {
    "action": "Save",
    "entityId": "257044711",
    "entityType": "Track",
    "nonce": "0xddb5c9dc960438298746051e7b483deb0ecfa6fec2813f3adb93dd9e678db87d",
    "signature": "0xe3cc07d167c1d505580bde70f99db02e328ed3760b41f7584ed4d04926c3e111530528ff589c374cdc2cf88633f546c8df37a5afa4fbebe35f4bddf3ca7c55311c",
    "signer": "0x96818aB6687d2E9bA070EB1d6843ef7BfEF5cDa4",
    "userId": "806873848"
  }
}