{
  "templateId": "multi-column-with-fixed-column/template.xlsx",
  "data": {
    "Data": {
      "columns": [
        { "name" : "Fixed" },
        { "name": "colCopy1", "fromTemplateColumn": "TemplateColumn" },
        { "name": "colCopy2", "fromTemplateColumn": "TemplateColumn" }
      ],
      "data": [
        {
          "Fixed": "a",
          "colCopy1": "1",
          "colCopy2": "2"
        },
        {
          "Fixed": "b",
          "colCopy1": "3",
          "colCopy2": "4"
        }
      ]
    }
  }
}