{
  "manageEntity": {
    "action": "Save",
    "entityId": "1378095585",
    "entityType": "Track",
    "nonce": "0x651e8acdb47915dc8803b46ed87c507a6081298bb6ca9457406e4e709037207d",
    "signature": "0x1fa7dd95d5f6a07fb4af3a72375bd9480f6bf965aac47e9d23d0ccb8c460e04272bb5db25fa26a7b3025b813cabd778fbd8267372fc4098ea97a9e321a93b5df1c",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}