Visualizer 
{
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    "event": {
        "type": ""
    },
    "previousEvent": null,
    "context": {
        "naturalSize": {
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            "height": 0
        },
        "crop": {
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            "width": 50,
            "height": 50
        },
        "zoom": 1,
        "rotation": 0,
        "offset": {
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        }
    }
}