{
  "manageEntity": {
    "action": "Save",
    "entityId": "659123851",
    "entityType": "Track",
    "nonce": "0xd0e111e1f10fac4a85dde421b00120dde2b53209251762dd0903fb1e94343dde",
    "signature": "0x8cf0f589f07a6e53e0828763c69af982521fcaf1413318d638101a16140cd8287b3b62381b7eda776c73d43cb63f02aef99dbc95428bfb1c8a5ae294839d6aa41c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}