curl --request GET \
  --url https://api.xem.email/api/v1/api/v1/analytics/heatmap

{
  "clicks": [
    {
      "count": 123,
      "element": "<string>",
      "x": 123,
      "y": 123
    }
  ],
  "segments": [
    {
      "clickRate": 123,
      "count": 123,
      "selector": "<string>"
    }
  ],
  "url": "<string>"
}