{
  "manageEntity": {
    "action": "Save",
    "entityId": "1309038121",
    "entityType": "Track",
    "nonce": "0x1392de5236546bedbe97bc2107a7862b17c6a431b7a1c34bb452ccb2c96c7866",
    "signature": "0x307339a9e58c7761d5a84d0bf817d4f7f6dd9daa9408d13a95f88ea5c2f8737d6c134c558bb227483f823e8d1ba24d72109c7ddd37a733dfa88ed856358bd8fe1c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}