Ground response format

{
  "result_type": "ground",
  "targets": [
    {
      "id": "total",
      "status": "found",
      "matches": [
        {
          "rank": 1,
          "matched_text": "1,200.50",
          "match_method": "normalized",
          "confidence": null,
          "location": { "kind": "text_span", "page": 1, "char_start": 120, "char_end": 128 },
          "cropped_image_url": null
        }
      ]
    }
  ],
  "units": 1
}