var testData = []byte(`{"file_id": 1234}`)


    downloadReq, err := http.NewRequest("POST", "https://api.opensubtitles.com/api/v1/download", bytes.NewBuffer(testData))


    downloadReq.Header.Add("Api-Key", "WITHHELD_FOR_POST")
    downloadReq.Header.Add("Content-Type", "application/json")
    downloadReq.Header.Add("User-Agent", "leshmoa/1.0")

    downloadResp, err := http.DefaultClient.Do(downloadReq)