Arcgis 使用json数据而不是层服务url

我不想在arcgis中使用层url。相反，我想在arcgis中使用json数据，我们可以这样做吗

var tileLayer = new ArcGISTiledMapServiceLayer("http://tiles.arcgis.com/tiles/nzS0F0zdNLvs7nc8/arcgis/rest/services/US_Counties_basemap/MapServer ");
map.addLayer(tileLayer);

var layerUrl = "http://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/USA_Counties_Generalized/FeatureServer/0";