{
  "layers" : [
    {
      "layerId" : 2, 
      "layerName" : "NorthMask", 
      "layerType" : "Feature Layer", 
      "minScale" : 5000000, 
      "maxScale" : 0, 
      "legend" : [
        {
          "label" : "", 
          "url" : "288C526", 
          "imageData" : "iVBORw0KGgoAAAANSUhEUgAAABoAAAAaCAMAAACelLz8AAAAAXNSR0IB2cksfwAAAAlQTFRF/v//bGxsyvLrtkQLkQAAAAN0Uk5TAP//RFDWIQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABxJREFUKJFjYCATMGIFECkmLGBUalQKf7IhAwAAvwYDdd8LbKYAAAAASUVORK5CYII=", 
          "contentType" : "image/png"
        }
      ]
    }, 
    {
      "layerId" : 3, 
      "layerName" : "SouthMask", 
      "layerType" : "Feature Layer", 
      "minScale" : 5000000, 
      "maxScale" : 0, 
      "legend" : [
        {
          "label" : "", 
          "url" : "35E26073", 
          "imageData" : "iVBORw0KGgoAAAANSUhEUgAAABoAAAAaCAMAAACelLz8AAAAAXNSR0IB2cksfwAAAAlQTFRF/v//bGxsyPLkJX/CbgAAAAN0Uk5TAP//RFDWIQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABxJREFUKJFjYCATMGIFECkmLGBUalQKf7IhAwAAvwYDdd8LbKYAAAAASUVORK5CYII=", 
          "contentType" : "image/png"
        }
      ]
    }]
}