public Preset unmarshall(JsonUnmarshallerContext context) throws Exception {
    Preset preset = new Preset();

    int originalDepth = context.getCurrentDepth();
    String currentParentElement = context.getCurrentParentElement();
    int targetDepth = originalDepth + 1;

    JsonToken token = context.currentToken;
    if (token == null) token = context.nextToken();

    while (true) {
      if (token == null) break;

      if (token == FIELD_NAME || token == START_OBJECT) {
        if (context.testExpression("Id", targetDepth)) {
          context.nextToken();
          preset.setId(StringJsonUnmarshaller.getInstance().unmarshall(context));
        }
        if (context.testExpression("Name", targetDepth)) {
          context.nextToken();
          preset.setName(StringJsonUnmarshaller.getInstance().unmarshall(context));
        }
        if (context.testExpression("Description", targetDepth)) {
          context.nextToken();
          preset.setDescription(StringJsonUnmarshaller.getInstance().unmarshall(context));
        }
        if (context.testExpression("Container", targetDepth)) {
          context.nextToken();
          preset.setContainer(StringJsonUnmarshaller.getInstance().unmarshall(context));
        }
        if (context.testExpression("Audio", targetDepth)) {
          context.nextToken();
          preset.setAudio(AudioParametersJsonUnmarshaller.getInstance().unmarshall(context));
        }
        if (context.testExpression("Video", targetDepth)) {
          context.nextToken();
          preset.setVideo(VideoParametersJsonUnmarshaller.getInstance().unmarshall(context));
        }
        if (context.testExpression("Thumbnails", targetDepth)) {
          context.nextToken();
          preset.setThumbnails(ThumbnailsJsonUnmarshaller.getInstance().unmarshall(context));
        }
        if (context.testExpression("Type", targetDepth)) {
          context.nextToken();
          preset.setType(StringJsonUnmarshaller.getInstance().unmarshall(context));
        }
      } else if (token == END_ARRAY || token == END_OBJECT) {
        if (context.getLastParsedParentElement() == null
            || context.getLastParsedParentElement().equals(currentParentElement)) {
          if (context.getCurrentDepth() <= originalDepth) break;
        }
      }

      token = context.nextToken();
    }

    return preset;
  }