{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "div",
  "style": {
    "position": "relative",
    "height": "42px"
  },
  "attributes": {
    "class": "=if([$_CommentCount]>0,'ms-fontColor-themePrimary','ms-fontColor-neutralTertiary')"
  },
  "children": [
    {
      "elmType": "div",
      "style": {
        "font-size": "36px"
      },
      "attributes": {
        "iconName": "Message"
      }
    },
    {
      "elmType": "div",
      "txtContent": "=if([$_CommentCount],if([$_CommentCount] > 999, '1k+', [$_CommentCount]),0)",
      "style": {
        "position": "absolute",
        "width": "36px",
        "text-align": "center",
        "font-size": "16px",
        "top": "6px"
      }
    }
  ]
}