{
  "manageEntity": {
    "action": "Save",
    "entityId": "1015785852",
    "entityType": "Track",
    "nonce": "0x82c5dfe73e212713d1417b35895287b84f7e6d5bc14fa55da2fce0358454ef1f",
    "signature": "0x263cdd924667c1078e1234e1268ba1156da54255b86d03b6203344d1f28bd96556ac375d467f870a72446402e9807540d979842a15d3895c7072dc205a1822f71c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}