{
  "manageEntity": {
    "action": "Save",
    "entityId": "307147106",
    "entityType": "Track",
    "nonce": "0xf34de30ad2dfae6762f099a12600a104548aab45f964c987edade243cda8928e",
    "signature": "0x5bc29d3ad08eea0936ca14fe83647276538e8dd3827dcea2817b2b635864a51e5e445cb49e79a3e34874a7a3165f5773933fb089cd4dfc98ab16a6105e280af11b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}