Удалите br in accept-encoding
"accept-encoding": "gzip, deflate",
Результат запроса будет выглядеть следующим образом
{"milliseconds": 3, "language": "EN", "version": "2.6.1", "results": {"places": {"mentions": [{"featureCode": "PCLI", "featureClass": "A", "confidence": 1.0, "lon": 2.0, "countryGeoNameId": "3017382", "source": {"charIndex": 18, "string": "france"}, "population": 64768389, "stateGeoNameId": "", "countryCode": "FR", "name": "Republic of France", "stateCode": "00", "id": 3017382, "lat": 46.0}], "focus": {"cities": [], "countries": [{"score": 1, "featureCode": "PCLI", "stateGeoNameId": "", "featureClass": "A", "countryCode": "FR", "name": "Republic of France", "lon": 2.0, "countryGeoNameId": "3017382", "stateCode": "00", "id": 3017382, "lat": 46.0, "population": 64768389}], "states": []}}, "organizations": [], "people": []}, "status": "ok"}