{
  "manageEntity": {
    "action": "Save",
    "entityId": "124192",
    "entityType": "Track",
    "nonce": "0xb5efdd52672a5fa26aaa9bedebc2f9020d073d81ab175a3f1b7a49fac8d72ade",
    "signature": "0x2cd66219e95fb2c520ddd561bcd3a8375b5b3949a4abda8c2d4ccdae6d7adb161f9d8f0c9dc6648388cccffbf551e7e6db796a913aa5cdc15406095575cff1391c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}