{
  "manageEntity": {
    "action": "Save",
    "entityId": "2018443623",
    "entityType": "Track",
    "nonce": "0xef58e883a37e820ad670addf098d249e0adc125606d601bb6e3e8b8614796fad",
    "signature": "0xa19df1a93fcdc41752f98fb40f58690ab8422d2f681a1526095a580007ebaaf4729cc035413cbb63d24bee7538f43cdcf8fa9efe6c23626e2500a63272c7f9121c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}