Cannot filter the row return from appshet API

[gaixixon]

I have a function below running with google script to retrieve appsheet data via API call.

Everything works, however, I am unable to filter the data. What ever I do with selector, the appsheet API still return all the row, even when I intentionally makes some mistake in Filter query.

Can anybody help me out please.

function appSheetAPI(){

param={'appKey':'my-app-key',

               'appId':'my-app-Id',

              'table':'TripNames',

              'selector':' Filter(TripNames, [Currency Unit] = "KRW"), true)'

}

  var url = "https://api.appsheet.com/api/v2/apps/"+param.appId+

            "/tables/" + param.table+"/Action";

  var data = {

      "Action": "Find",

      "Properties": {},

      "Selector" : param.selector

}

resp = UrlFetchApp.fetch(url,{'method' : 'post','contentType': 'application/json',

  'headers':{'ApplicationAccessKey': param.appKey},

  'payload' : JSON.stringify(data)})

console.log(resp.toString());

 }