[
  "chart",
  [
    [
      1,
      [
        ["title", "title-1"],
        ["xlable", "X-lab"],
        ["ylable", "Y-lab"],
        ["description", "desc1"],
        ["type", "line"],
        [
          "series",
          [
            [
              1,
              [["x-data", [1, 2, 3, 4, 5]], ["y-data", [20, 90, 60, 50, 30]]],
            ],
          ],
        ],
      ],
    ],
  ],
]