{
  "manageEntity": {
    "action": "Save",
    "entityId": "1682157783",
    "entityType": "Track",
    "nonce": "0x9d4da53298cadfe7c42b00cb539680ce9de0bbd019d44d638c5cab146a6b3115",
    "signature": "0xca5fdcfa0a4726dd7ac2be43aa96c417d74e3a560244886d4454cc0173cdf4042657f1be2f10fc0e9375e6959754631f544258780ba336f4f6e3bd0e147f8d151c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}