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Content-Type: application/json

{
   "nodes":[
      {
         "icon":"iVBORw0KGgoAAAANSUhEUgAAABIAAAASCAYAAABWzo5XAAAACXBIWXMAAA9hAAAPYQGoP6dpAAAA+0lEQVQ4je2RsWrCUBSG/3u5NS6ltU4Sl1MuIhazOYhP0IewfQH7MuIu+Ax9BbuULi0tIikZDG42YKckeE+HUgjkRtN29VvP/38czgGO/Bsi8ojIO5QTRYNuW/fPK2oKRgMAGFhHsbl5XS4fS4u6bd2/PK3eTwbuhRLfkdQwRvNw875Nr20yaROdVdQ0KwGAEykwHjTrNUfMbJ2ciIg8wWhkJT84UsAwXK11p9RGfyEnCoLgmYF1ajgXjncMJWXo+/5bqY0+jbkdzVebJCOLd4y7h/AjSnho6xS+/6rV6tUcMTMMFwCUlGGU8PBlsXgq6uxFa92xHffI7/kCsF1RWSlSxcoAAAAASUVORK5CYII=",
         "title":"testlayer3",
         "type":"layer"
      },
      {
         "icon":"iVBORw0KGgoAAAANSUhEUgAAABIAAAASCAYAAABWzo5XAAAACXBIWXMAAA9hAAAPYQGoP6dpAAAA5klEQVQ4je3QPw/BQBjH8V/LJdfKdSAXEXZhsIiBd2CyWsS7MFnF4pWY+x4MIhIDfQFYhMR/0rsy0EiqklaMvslN99wnTw7494sKz/NdmhYtM04tg9OtwemWcTojOil9mlc+IpmYWWsX40rkMSKFA7MzWm8W56p9soeBIMapVe9Vsi7iJm0H/dbA2q8uOe8b1ccpKEDKiwBAhKiAgzSAfBDoq/ygyQ3KUgrn7UJcJaBiDmAaaCNxEE2zM1pL+4WJq4TZHW8uR9kItSrRSYlxbcYSdMcSdGck9SnRSTEU4ikPn8/9F747d+tCtRm7EewAAAAASUVORK5CYII=",
         "title":"A test vector layer",
         "type":"layer"
      }
   ],
   "title":""
}