Create markers in bulk
POST
{{cartes_api_base_url}}/maps/{{cartes_map_uuid}}/markers/bulk
curl -X POST 'cartes_api_base_url/maps/048eebe4-8dac-46e2-a947-50b6b8062fec/markers/bulk' -H 'Accept: application/json' -d '{"markers":[{"lat":45,"lng":-18,"description":"Gray Lady","category":570},{"lat":21,"lng":-20,"description":"Hungry Pete","category":570}]}'