{
 "layers": [
  {
   "layerId": 1,
   "layerName": "Census Tracts 500K",
   "layerType": "Feature Layer",
   "minScale": 1000000,
   "maxScale": 500000,
   "legend": [
    {
     "label": "",
     "url": "9fe37c026b7bbed80941bb52b10a73d2",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAKklEQVQ4je3MIQEAAAzDsIP613w83MFFQLgyFmr4Ii30KBxhoUfhCAtPexArAFF5acCuAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 2,
   "layerName": "Census Block Groups 500K",
   "layerType": "Feature Layer",
   "minScale": 1000000,
   "maxScale": 500000,
   "legend": [
    {
     "label": "",
     "url": "9fe37c026b7bbed80941bb52b10a73d2",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAKklEQVQ4je3MIQEAAAzDsIP613w83MFFQLgyFmr4Ii30KBxhoUfhCAtPexArAFF5acCuAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 3,
   "layerName": "Census Tracts 500K",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 500000,
   "legend": [
    {
     "label": "",
     "url": "144525ff7cdc9dd6e491ba2dbc9d982c",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAT0lEQVQ4jWNRK8z/z0BFwEJNw+hi4DUyzNDCZyDDrf6J2qSYplaYfxXZ0KEXhhQDFsqNQAWjBlIOWKhgxhA3UAuaN6lXODCgKSAVDP4wBAA5DgnZq7vX8wAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  },
  {
   "layerId": 4,
   "layerName": "Census Block Groups 500K",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 500000,
   "legend": [
    {
     "label": "",
     "url": "cb364136277810c753453dcfc9b8c86e",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAZElEQVQ4jWNJWrzwPwMVAQs1DaODgYwMqxn/Ma4mxYD/jP+1GRgY6rEaCDJsblwcSQYmL1oEMhSHC6kAWEYNpBiwUG4EKhg1cLCH4X/G/9qgvElG4cCA1UBQqYGc0ckBgz/ZAACwvhfEAFBGSgAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  }
 ]
}