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     "groupId": "0",
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     "url": "54ba6d35ba90b38d1dc223ce9f21e462",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAWElEQVQ4jWNhoDJgGTVwEIbh5df/GxgYGewZGBgcKDTrAMN/hkYWBkaGeio5zoGBkcFhNNlQDliob+B/BkdoTFMj2Rxk0RVlPADmUAmwUMsgGBg1kIFiAABO2A2SiWX3VAAAAABJRU5ErkJggg==",
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     "groupId": "0",
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    },
    {
     "label": "14",
     "url": "e19160abaa2a95aebc332aea3c02a6e5",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAX0lEQVQ4je2SsRGAMAwDpcTMRSgpmCkwEiVdGCwRQ9gFRX6AP53uDcHYFP7ww34/JxNXScUjItk6+mUgqiT3MkklIZWZjR8LFw6OLSPXiGw09Npy7A1AC1uIYGwK4eUD/5MdjzJ2HGAAAAAASUVORK5CYII=",
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     "contentType": "image/png",
     "groupId": "0",
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     "url": "31c601bdf5897ced569566d3e98e6f9e",
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     "groupId": "0",
     "height": 20,
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     "values": [
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    {
     "label": "18",
     "url": "e9d0abdbb0f7582de8420875297ef296",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAV0lEQVQ4je2SsQ2AQAwDbcnLMAX5yYDJeKZgnCAkNogLirhLc7KcE8xRA3+44Z3nTnAFEEXWTOQhgpupXBCM1qYe2YGJHN+nHdpcWjjme5gKorWpx77hAy5VEJOLc8XKAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
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     "values": [
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    {
     "label": "19",
     "url": "35c5cbfdea726a7b31264da17b94d86c",
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     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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    },
    {
     "label": "21",
     "url": "fb732c1cd722f34b4e6b35e8656e7de9",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAXklEQVQ4je2SwQ2AIBAEd/HaoQaxMrQzLMEH5cCa2MLdwwdTwGSyWUMwtoQ/3HA8/UyJu6TiEZFswLiMRJXkLtMXlMq6jR8LF5LzALYacZs5dRtzbgBaWCGCsSWElxdD/huNu4cIdgAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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    },
    {
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     "url": "ec5bc134fb54528c2af5de9585b22087",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAW0lEQVQ4je2SwQmAMBAE52RbsQ7j06qiVfmNdViLnmgLOUEwU8AwLCuCURN+cMN1P2boBvBUp7ICLALL4AFtfgeldpt69ILQRiDH3ObcNPXPf0pgYSwK9vFD4QX0qg+P6xVQrAAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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    },
    {
     "label": "<all other values>",
     "url": "2ec885847e0de94b9b531fabd7315c29",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAOElEQVQ4je3QMQEAIAzEwAwvDFwgERcgDRFkayPghgS5NFjh4YajgsCwQeqBVwUXTBVELg1+pz98+DwDUfFn98UAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "1",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "Beat Number"
    },
    {
     "id": "1",
     "heading": ""
    }
   ]
  }
 ]
}