def METHOD_NAME():
    """
    Return the data schema for a record in MongoDB.
    It's a dictionary where:
    - key is schema attribute name
    - a value is a tuple of (default value, expected data type)
    :return: a dictionary
    """
    doc = {'pileupName': ('', str),
           'pileupType': ('', str),
           'insertTime': (0, int),
           'lastUpdateTime': (0, int),
           'expectedRSEs': ([], list),
           'currentRSEs': ([], list),
           'fullReplicas': (0, int),
           'campaigns': ([], list),
           'containerFraction': (1.0, float),
           'replicationGrouping': ('', str),
           'activatedOn': (0, int),
           'deactivatedOn': (0, int),
           'active': (False, bool),
           'pileupSize': (0, int),
           'ruleIds': ([], list)}
    return doc