Like/Unlike List Item

{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "div",
  "children": [
    {
      "elmType": "div",
      "style": {
        "font-size": "18px",
        "padding": "2px 12px",
        "cursor": "pointer"
      },
      "attributes": {
        "class": "ms-fontColor-themePrimary",
        "title": "=if(indexOf([$LikedBy.email], @me) > -1 , 'Unlike', 'Like')"
      },
      "customRowAction": {
        "action": "setValue",
        "actionInput": {
          "LikesCount": "=if(indexOf([$LikedBy.email], @me) > -1, [$LikesCount] - 1, [$LikesCount] + 1)",
          "LikedBy": "=if(indexOf([$LikedBy.email], @me) > -1, removeFrom([$LikedBy.email], @me), appendTo([$LikedBy.email], @me))"
        }
      },
      "children": [
        {
          "elmType": "span",
          "attributes": {
            "iconName": "=if(indexOf([$LikedBy.email], @me) > -1 , 'Dislikesolid', 'Likesolid')"
          }
        },
        {
          "elmType": "span",
          "style": {
            "margin-left": "5px"
          },
          "txtContent": "[$LikesCount]"
        }
      ]
    }
  ]
}