{
  "manageEntity": {
    "action": "Save",
    "entityId": "887425249",
    "entityType": "Track",
    "nonce": "0xe919607056ea313539bfa5f1628ff6db3f48ef248524493a575eed6b5b7573cb",
    "signature": "0x613c060f8a90d6f5cfc94d5601c020ece61de939c1e8e3c5abff1e1313f5a3a53afc289337e94e82ddebf5f4881406d36cbd00fa782ed8552afa2e74cd6a6af21c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}