Single Set
{"datasets": [{"name": "2018","startColor": "#8085e9","endColor": "#FFFFFF","circleColor": "#51BBD1","borderColor": "#19227F","points": [{"x": "Berlin","y": "17"},{"x": "Paris","y": "38"},{"x": "London","y": "177"},{"x": "Rome","y": "24"}]}]}​
Multi Set
{"datasets": [{"name": "2018","startColor": "#8085e9","endColor": "#FFFFFF","circleColor": "#51BBD1","borderColor": "#19227F","points": [{"x": "Berlin","y": "17"},{"x": "Paris","y": "38"},{"x": "London","y": "177"},{"x": "Rome","y": "24"}]},{"name": "2017","startColor": "#f15c80","endColor": "#FFFFFF","circleColor": "#51BBD1","borderColor": "#19227F","points": [{"x": "Berlin","y": "4"},{"x": "Paris","y": "54"},{"x": "London","y": "17"},{"x": "Rome","y": "14"}]},{"name": "2016","startColor": "#7cb5ec","endColor": "#FFFFFF","circleColor": "#51BBD1","borderColor": "#19227F","points": [{"x": "Berlin","y": "10"},{"x": "Paris","y": "2"},{"x": "London","y": "17"},{"x": "Rome","y": "120"}]}]}​