// Define struct of request json body
type TranslateJson struct {
  FieldId string `json:"fieldId"`
  Text []string `json:"text"`
  TargetLang string `json:"targetLang"`
  SourceLang string `json:"sourceLang"`
}

// Post text and get translation results
func PostApiExample(accessKey, secretKey, basePath, nonce string) {
  translatePath := "/api/v1/translate"
    
  signTranslate := MakeHMAC(nonce, translatePath, secretKey)

  testJson := &TranslateJson{
    FieldId: "1",
    Text: []string{"This is a pen.", "I have an apple."},
    TargetLang: "ja", 
    SourceLang: "en",
    ContractId: "your contractId"}
  jsonValue, _ := json.Marshal(testJson)

  client := &http.Client{}
  req, err := http.NewRequest(
    "POST",
    GetFullUrl(basePath, translatePath),
    bytes.NewBuffer([]byte(jsonValue)),
  )
  req.Header.Set("Content-Type", "application/json")
  req.Header.Set("nonce", nonce)
  req.Header.Set("accessKey", accessKey)
  req.Header.Set("signature", signTranslate)
  res, err := client.Do(req)
    
  if err != nil {
    fmt.Printf("The HTTP request failed with error %s\n", err)
  } else {
    data, _ := ioutil.ReadAll(res.Body)
    fmt.Println(string(data))
  }
}