adWordsConversionTracker.setCategory(ConversionTrackerCategory.DEFAULT);
adWordsConversionTracker.setMarkupLanguage(AdWordsConversionTrackerMarkupLanguage.HTML);
adWordsConversionTracker.setTextFormat(AdWordsConversionTrackerTextFormat.HIDDEN);
// Create operations.
ConversionTrackerOperation operation = new ConversionTrackerOperation();
operation.setOperator(Operator.ADD);
operation.setOperand(adWordsConversionTracker);
ConversionTrackerOperation[] operations = new ConversionTrackerOperation[] {operation};
// Add conversion.
ConversionTrackerReturnValue result = service.mutate(operations);