code: public Subtitle getSubtitle(int trackID) throws MusixMatchException {
          Subtitle subtitle = null;
          SubtitleGetMessage message = null;
          Map<String, Object> params = new HashMap<String, Object>();
  
          params.put(Constants.API_KEY, apiKey);
          params.put(Constants.TRACK_ID, new String("" + trackID));
  
          String response = null;
  
          response = MusixMatchRequest.sendRequest(Helper.getURLString(
  				Methods.TRACK_SUBTITLE_GET, params));
  
          Gson gson = new Gson();
  
          try {
              message = gson.fromJson(response, SubtitleGetMessage.class);
          } catch (JsonParseException jpe) {
              jpe.printStackTrace();
              handleErrorResponse(response);
          }
  
          subtitle = message.getContainer().getBody().getSubtitle();
  
          return subtitle;
      }
docs: Get Subtitle for the specific trackID.
  
  @param trackID
  @return
  @throws MusixMatchException