[
  {
    "op": "core/column-addition",
    "engineConfig": {
      "facets": [],
      "mode": "row-based"
    },
    "baseColumnName": "E|120",
    "expression": "grel:value",
    "onError": "set-to-blank",
    "newColumnName": "8200",
    "columnInsertIndex": 3,
    "description": "Create column 8200 at index 40 based on column E|120 using expression grel:value"
  }
]