[
  {
    "op": "core/column-addition",
    "engineConfig": {
      "facets": [],
      "mode": "row-based"
    },
    "baseColumnName": "E|100",
    "expression": "grel:value.split('\u001f')[0].slice(1)",
    "onError": "set-to-blank",
    "newColumnName": "7100a",
    "columnInsertIndex": 5
  }
]