{
  "manageEntity": {
    "action": "Save",
    "entityId": "655125",
    "entityType": "Track",
    "nonce": "0xc86f2c89661194ceb10b26442e818d757bca262f6a3936114f3df1e96340cd6b",
    "signature": "0xa9213c17650f31577eb69d377d28194cb0c9109d6be20c13d4b36fc9591f30b340397ed879370d757c2649d29b1e7718d77b91199fec9d739f922b77c10f37dd1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}