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     "url": "067c6c0af5804b13bce5a5cbbd6250cf",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAdElEQVQ4jWNhoDJgGTWQYsAygg38v/9FBAMD4xvCWv6LYFPH6Ci+B9WF/xlDGRj/r8Zr6H8GOwYGRhA6RNCFDAwMLxn+MogzMDMQ4UrcgAXh5v+HGJgJeJnx/zVCwcICV+sosYISlw3BZEMtwEI1kxhGrIEANusWoi+znVMAAAAASUVORK5CYII=",
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     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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    },
    {
     "label": "CTA Purple Line",
     "url": "5c7276734b45defe7c819332e7b388bc",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAeElEQVQ4jWNhoDJgGTWQYsAygg1cwfA0gpGB5Q0hDf8Z/ohgUxfOIL4HxUAmBsbQfwx/VuMzlInhnx2YZGA4RNCFDAwMLxkYGMUZGBgIuhIfYIEx/jH8P0TIy38Z/l0jpIYFxohgkF5BicuGYLKhFmChmkkMI9ZAAOZsGLmiuJhZAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "CTA Yellow Line",
     "url": "143d4cdc36e779f606453fdffbbbebed",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAYklEQVQ4jWNhoDJgGTWQYsAygg38/58hgoGB4Q0RekSwqWNkZNiD7sJQBgaG1QQMtYPShwi6kIGB4SUDA4M4ka5kIMbAQ0QYdo2QGhYYg5GRYQUlLhuCyYZagIVqJjGMWAMBQ3cOQygCGXUAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "Noncommuter",
     "url": "ce8e29df9874cb7377f562d33cfab7f4",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAbUlEQVQ4jWNhoDJgGTWQYsAyvAxsL3RRYmFgUCrt37OHKgayMDAoEaEGAjoLXBoYCIB//yEGdha42KDLlU/Y00DbMCyH2oAPdBe6uIBoqoUhCPxhYLjHgAewMJAA8LlsmCZsYgALUapIAIPfQACTrBao6/mxbQAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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    },
    {
     "label": "Noncommuter and Metra",
     "url": "ce088f094a2d13196a8d4718d2317c4e",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAbUlEQVQ4jWNhoDJgGTWQYsAyvAxcW8ig9IeBQSm8n2EPVQz8w8CgREgNC4yxooDhPyHF/6EqVhRgykVMYGAk2YXEABZ0G/CBlYUMLiCaamEIAiwMDPcY8AAWBhIAPpcN04RNDGAhShUJYPAbCADqzxHyn1rARwAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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      "0,MILWAUKEE DISTRICT/WEST LINE_NORTH CENTRAL SERVICE",
      "0,MILWAUKEE DISTRICT/WEST LINE_NORTH CENTRAL SERVICE_MILWAUKEE DISTRICT/NORTH LINE",
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    },
    {
     "label": "Railroad track",
     "url": "b3966366900f6648375e7ac703af2248",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAbklEQVQ4jWNhoDJgGTWQYsAyvAws9GZQYmZhUOrZyLCHKgYyszAoEVLDAmOU+DA0EFL8/y/EwBIfBht0uZ4tEP20C8MeqA34QIk/gwtYLbXCEAT+/mG4x4AHsDCQAPC5bJgmbGIAC1GqSACD30AA+QITJHSEulUAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "1",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "COMM_STATUS, Commute_Line"
    },
    {
     "id": "1",
     "heading": ""
    }
   ]
  }
 ]
}