{
  "manageEntity": {
    "action": "Save",
    "entityId": "85909090",
    "entityType": "Track",
    "nonce": "0x156bccb2bf8b74101355be2c7a952cbc0c75692c3f3c693b5f8257fe433c93d4",
    "signature": "0x7b6e92b8e5dee1485269e381afefe88fcfd4e97e38a1603b37a4ec22f0d8e9ac30af4c1ac3e58f6e4a89add5c21da62ccdf15426d9a5deff0a232ceca319339a1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}