{
  "manageEntity": {
    "action": "Save",
    "entityId": "593147922",
    "entityType": "Track",
    "nonce": "0x047a9d44f0e2658bbe363eabaf2c66d8476610d8642f7ea441d429f23dc43e6a",
    "signature": "0xed848468c9adec78fa27832e706f400048c7df2a90e57486238a4337a915bec073359b3179dc21747a59311c0b3b0c375221754d95ff1821c893fe215bbd6adb1c",
    "signer": "0x98591a180A20DF036EB2C9D2c24B449E65939Df5",
    "userId": "338604526"
  }
}