Edit in JSFiddle

var chartModel = new ZingChart.ZingChartModel({
    json: {
		type: "bar",
		series: [
			{
	            values: [3,2,3,3,9]
            },
            {
	            values: [1,2,3,4,5]
            }
        ]
    },
    width: 500,
    height: 400
});

var chartView = new ZingChart.ZingChartView({
    model: chartModel,
    el: $("#chart")
});

chartView.render();

var newJson = {
	type: "line",
	series: [
		{
			values: [1,1,2,3,5,8,13]
        }
    ]
};

$("#change").click(function(){
    chartModel.set('json', newJson);
});

<div id="chart"></div>

<button id="change">Set JSON</button>