{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "div",
  "style": {
    "margin": "5px",
    "display": "flex",
    "justify-content": "center",
    "width": "100%"
  },
  "children": [
    {
      "elmType": "img",
      "style": {
        "cursor": "pointer"
      },
      "attributes": {
        "src": "@thumbnail.50"
      },
      "customCardProps": {
        "directionalHint": "rightCenter",
        "openOnEvent": "hover",
        "isBeakVisible": true,
        "formatter": {
          "elmType": "div",
          "style": {
            "width": "520px",
            "height": "520px",
            "padding": "10px",
            "display": "flex",
            "justify-content": "center",
            "align-items": "center"
          },
          "children": [
            {
              "elmType": "img",
              "attributes": {
                "src": "@thumbnail.500"
              }
            }
          ]
        }
      }
    }
  ]
}