{
  "manageEntity": {
    "action": "Save",
    "entityId": "1592754973",
    "entityType": "Track",
    "nonce": "0x9f487b1da0968e521eb029e815678f6719c9eae53b21509173b6033a2524b466",
    "signature": "0xe379e9359726c900715a6fd6f3c276beb4fa09d2b0cab1f0879eaab7c9e9a7ea0c8d9a532ed9d49323081d948bd01a9abde09c25eef24b80cdac2b4358908c021b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}