code: public static Map<String, Object> initUser() {
  
      Map<String, Object> user = new HashMap<String, Object>();
      Map<String, Object> tone = new HashMap<String, Object>();
  
      Map<String, Object> emotionTone = new HashMap<String, Object>();
      emotionTone.put("current", null);
  
      Map<String, Object> socialTone = new HashMap<String, Object>();
      socialTone.put("current", null);
  
      Map<String, Object> languageTone = new HashMap<String, Object>();
      languageTone.put("current", null);
  
      tone.put("emotion", emotionTone);
      tone.put("social", socialTone);
      tone.put("language", languageTone);
  
      user.put("tone", tone);
  
      return user;
    }
docs: initUser initializes a user containing tone data (from the Watson Tone Analyzer).
  
  @return the map
  @returns user with the emotion, language and social tones. The current tone identifies the tone for a specific
  conversation turn, and the history provides the conversation for all tones up to the current tone for
  an assistant instance with a user.