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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAMUlEQVQ4jWNhoDJgoZmB/xkY/lNiECMDAyOKgdQCowaOGjhq4KiBdDYQVp5RzUBqAQBgfwJTXu298gAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    },
    {
     "label": "Green: Band_2",
     "url": "e216868d9a4643abb2db7f4d18d27a21",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAL0lEQVQ4jWNhoDJgoZ2B/xn+U2QSIwMjqoFUAqMGjho4auCogfQ2EFqeUc9AKgEAX34CUy+sLnAAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    },
    {
     "label": "Blue:  Band_3",
     "url": "e0489ac473c93eb30a020bb9afaf2689",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAALUlEQVQ4jWNhoDJgoaGB//9TZhQjI5qB1AGjBo4aOGrgqIF0NxBSnlHRQOoAAF59AlNvIrzVAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "RGB"
    }
   ]
  }
 ]
}