{
  "manageEntity": {
    "action": "Save",
    "entityId": "1785325209",
    "entityType": "Track",
    "nonce": "0x522d68c7c02dd31ed8cd49ebb5d53db4fed4663606db7f25b695cd65eba6f423",
    "signature": "0x33c35f74ba48a9462cf6632636447a2cbec01d9a8ad28aed57943deeddbbaae208df3ff4787042d9940f7cd87e80364e9c7a871a6c34d173bbf1984e2159c79e1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}