{
  "manageEntity": {
    "action": "Save",
    "entityId": "1390829674",
    "entityType": "Track",
    "nonce": "0x13d2c2f60f9fed22a5dcc3ef25f7dc8e56ddccb4904d49dc7314633e8965cfb7",
    "signature": "0x0cafb3da0793917aa9f0d60c23b549d90c1604a6cfb31b4eff49f42c36bf4df43f5ef03056580aae8c2a042e4a1765af6a220dbb74b6672bbed3cdeef77618de1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}