{
  "manageEntity": {
    "action": "Save",
    "entityId": "1006576",
    "entityType": "Track",
    "nonce": "0xcd1e39adbf3c0971ec5a994cf6c6ac7110436ce33af94987e1c04c35c0dafe15",
    "signature": "0xdf8e2d1651216ad74a9f2a09eee646e259a3271678b3fc4cd4a09707793b80d34c1456571cb19e6be67161266f10389e947702c57f88b8d60c906111c45ff7981c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}