{
  "manageEntity": {
    "action": "Save",
    "entityId": "1802147185",
    "entityType": "Track",
    "nonce": "0x278665f21bc0fadde54c0b8ee435ccd55b42833261b6db63bd8f8b50b5735857",
    "signature": "0x134f4a5c6d40bf2cd23e92c6363da57a485d912f12e85c7cc92fde5c0cc33e60472c74689d40ad7178b8b2495c4d8836f1316791699562f6b6c5461529b12aa71b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}