Convert a row for update event

    Args:
        row (dict): event row data

def _convert_update_row(row):
    """ Convert a row for update event

    Args:
        row (dict): event row data
    """
    after_values = row['after_values']  # type: dict
    before_values = row['before_values']  # type: dict
    values = after_values
    return {
        'values': values,
        'updated_values': _get_updated_values(before_values, after_values)
    }