def parse_course_sync_agent_data(json):
    """
    Parse the incoming statement for a sync agent event concerning a course.

    :param json: A statement concerning a course that needs to be synced.
    :type json: dict(str, NoneType)
    :return: A dictionary containing the course id, platform, course name, verb and actor id of the statement.
    :rtype: dict(str, str)
    """
    statement = json['statement']
    course_id = statement['object']['id'].split("=")[-1]
    actor_id = int(statement['actor']['account']['name'])
    platform = statement['context']['contextActivities']['category'][0]['definition']['name']['en']
    course_name = statement['object']['definition']['name']['en']
    verb = statement['verb']['display']['en']
    sync_course_data = {
        'courseId': course_id,
        'platform': platform,
        'course_name': course_name,
        'verb': verb,
        'actor_id': actor_id
    }
    return sync_course_data