{
 "layers": [
  {
   "layerId": 123,
   "layerName": "2000 Census",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "28e71b0aa8cbb2ccff63f78c5abeca8f",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAvElEQVQ4jdWVTQ6CMBBG35DeCzyAehjYC3s8jHIAysUcM40oaYjBZBbyLdqknbz+zPRrAKgHHVEqNkiUrj9Lm4/Xd1XrQwp6MGmxBWfBxG/TwZq1FX/V9STyBnoquAObm7YUxP4o0QWowgUoAR8gTmrspAYU4eAB1ILSajl43d2sHZQN3sBm0GQKfnWojK8H/191uDegUiXXXkigyxNlCVTS20+mvPTR2aRDSojZf/4FCN3qFj5x03J4hj8BTn0+CIuBlUQAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 124,
   "layerName": "2010 Census",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "2756cf92eb5b00967783d6bbe8dd797b",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAo0lEQVQ4jdWVaw6DIBCEh2TvJb0RN6jcgBuJJ8PMFmOxttVkTfT74QNhhHUYBSSUAYDHPiKS6z9aQyk8Sb0dsZ/866HoceuNR0nOLYKGiL1gKFxuRnLZRhB4Auj+FfuIoA1BV6qCDyPJjl4Wq9rN3ME2J/jQ65WhD4fqwYv58HaCvqb2O0zmtq6vD8i9T8ZVjmpIU5CD2HH9C4hfJjH3a1O+ik9kFiV0aC1B+AAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 125,
   "layerName": "2020 Census",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "",
     "url": "7a494865690427dd7a87eddd5a7fe1eb",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAsklEQVQ4jeWUyw3DIBBEH9Y2YaUYkz7oJaYX92FcTOIuTATIkT/Jwc7mlHdCAs2OdpcR3CNyGBPo6ms+utFC7OcbyZeHmYZdAaItgnOls3R1MhRwY59EBT08GC+lh4uefOcUTYfoCrp7C1Wj6LBqtIeSEYgeTuz2B4Tu0qqp8ZMpuzydtIdBRxBzA5r8fXQEdZG/FYy25NmWaXjtaU5m0gDXbFJq4bAk7oZFMk8WzLs3K57SHjKLYnztEgAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  }
 ]
}