ExcelSourcePreviewResponse

{
    "document": {
        "filename": "string"
    },
    "sheets": [
        {
            "id": "section-1",
            "name": "string",
            "pageNumber": 1,
            "blocks": [
                {
                    "type": "table",
                    "columns": [
                        "string"
                    ],
                    "rows": [
                        [
                            "string"
                        ]
                    ]
                }
            ]
        }
    ],
    "selectedSheetId": "string"
}