{
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  "layers" : [
    {
      "name" : "Signals", 
      "serviceItemId" : "2daa09208aba462e97de8e883f2ad1ea", 
      "url" : "https://services2.arcgis.com/MLoS3Qx4BXmDoTIY/ArcGIS/rest/services/Signals_WFL1/FeatureServer/0"
    }
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}