{ "data":{ "url": "https://cdn.jsdelivr.net/gh/koaning/justcharts/bigmac.csv", "format": { "type": "csv" } }, "mark": "line", "encoding": { "x": {"field": "date", "type": "temporal"}, "y": {"field": "dollar_ex", "type": "quantitative"}, "color": {"field": "currency_code", "type": "nominal"} }, "width": "container", "title": "hello there" }