[
  {
    "op": "core/text-transform",
    "engineConfig": {
      "facets": [],
      "mode": "row-based"
    },
    "columnName": "Column 1",
    "expression": "grel:'E|' + value.replace(' ','')",
    "onError": "keep-original",
    "repeat": false,
    "repeatCount": 10,
    "description": "Text transform on cells in column Column 1 using expression grel:'E|' + value.replace(' ','')"
  }
]