{
  "manageEntity": {
    "action": "Save",
    "entityId": "542600",
    "entityType": "Track",
    "nonce": "0xbe5d0a436df05900e09833ef474835f40279fa3e47597ba1a33328e7f7a84715",
    "signature": "0x0468485af5eaeb8b205886dd9839a50313f8447ba7215fabd2c07ee1213642da533eba72569b8127cf3ba1d14775597b93aeaa11f5c45f36f79a9db15c23149d1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}