curl --request POST \
  --url https://realtime.govworx.net/webhookhandler/call \
  --header 'Content-Type: application/json' \
  --data '
{
  "call_id": "<string>",
  "agencies": [
    {
      "id": 123,
      "name": "<string>",
      "code": "<string>",
      "type": "<string>",
      "geoAreaIds": [
        123
      ],
      "geoAreas": [
        {
          "id": 123,
          "properties": {
            "geoArea": "<string>",
            "name": "<string>",
            "color": "<string>"
          },
          "geometry": {}
        }
      ]
    }
  ]
}
'