{
  "manageEntity": {
    "action": "Save",
    "entityId": "1641727641",
    "entityType": "Track",
    "nonce": "0xbc5671f9719f15e9eafadcf5570d5045367c43aa2c50323e75f5864152bd897c",
    "signature": "0xee79360aae86cbce34d962ca82f9a06ca55828b05001864990103d190e709817634a44c14516c196cc255ae05a4d51ba952342d098ed1476815a3a384baa56051b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}