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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA60lEQVQ4je2TQQ6CMBBFJ4StBxAv4ALuwAVIt3AXkpbLANtJL8AB3MEV1AOwJ+ajEDQFrFHjwp+QwpC+/OmfuvRmuX/gd86QmRVWx3EqrFEUVS8BmVntylJ6QvTfbRDI1vdRz4QQygrIzGqfpnJT12MN7/3TNJKZyQR1TTCtdbjN8zvYVKjDORE9B+w3NQ0tySuKvgvx4NII7LounHP3sZvSBsGY+ioQbRySRKKtOSFtK4fHOM6Qpql1uMN/YZjHWSBcYjSQJgIawKckucJs5xDCJq11db4FNdRo4ShcWtHkms1eN7IB2ur3gRfOcWVjaHABnQAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "ValoreScalato"
    }
   ]
  }
 ]
}