{
  "manageEntity": {
    "action": "Save",
    "entityId": "1488138307",
    "entityType": "Track",
    "nonce": "0x19f212337ee4ec8fdaf5820dcf2a1654bda70ff9f48a19d95bc35e010186a292",
    "signature": "0xea6b2009338f11830983cf070f3d0640fed6564018431a0318af4a6c13e5647c14169691876643bc6cf644cb630150da7769bfa20a66832542c65203aad604c81b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}