curl --compressed -X POST \
  'https://api.targomo.com/westcentraleurope/v1/polygon_post?key=__targomo_key_here__' \
  -H 'Content-Type: application/json' \
  -d '{
    "sources": [{
        "lat": 52.52,
        "lng": 13.405,
        "id": "id123",
        "tm": {
            "walk": {}
        }
    }],
    "polygon": {
        "serializer": "geojson",
        "buffer": 0.002,
        "srid": 4326,
        "values": [1800]
    }
}'