{
  "manageEntity": {
    "action": "Save",
    "entityId": "1544699379",
    "entityType": "Track",
    "nonce": "0x3a33c6029bb084a69c10f5292183220cdd200d7ed754c50a8100f8f6cf621ec4",
    "signature": "0xe088bba52c333565d11e5d14b8d665147149154b87825048fd6e35222077bb7338854a37a84dabe1e6adc05915a2da128249a368ce1264cc6da5fa5b5ef483d41c",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}