def describe_affected_entities(filter=None, locale=None, nextToken=None,
    maxResults=None):
    """
    Returns a list of entities that have been affected by the specified events, based on the specified filter criteria. Entities can refer to individual customer resources, groups of customer resources, or any other construct, depending on the AWS service. Events that have impact beyond that of the affected entities, or where the extent of impact is unknown, include at least one entity indicating this.
    At least one event ARN is required. Results are sorted by the lastUpdatedTime of the entity, starting with the most recent.
    See also: AWS API Documentation
    
    
    :example: response = client.describe_affected_entities(
        filter={
            'eventArns': [
                'string',
            ],
            'entityArns': [
                'string',
            ],
            'entityValues': [
                'string',
            ],
            'lastUpdatedTimes': [
                {
                    'from': datetime(2015, 1, 1),
                    'to': datetime(2015, 1, 1)
                },
            ],
            'tags': [
                {
                    'string': 'string'
                },
            ],
            'statusCodes': [
                'IMPAIRED'|'UNIMPAIRED'|'UNKNOWN',
            ]
        },
        locale='string',
        nextToken='string',
        maxResults=123
    )
    
    
    :type filter: dict
    :param filter: [REQUIRED]
            Values to narrow the results returned. At least one event ARN is required.
            eventArns (list) -- [REQUIRED]A list of event ARNs (unique identifiers). For example: 'arn:aws:health:us-east-1::event/AWS_EC2_MAINTENANCE_5331', 'arn:aws:health:us-west-1::event/AWS_EBS_LOST_VOLUME_xyz'
            (string) --
            entityArns (list) --A list of entity ARNs (unique identifiers).
            (string) --
            entityValues (list) --A list of IDs for affected entities.
            (string) --
            lastUpdatedTimes (list) --A list of the most recent dates and times that the entity was updated.
            (dict) --A range of dates and times that is used by the EventFilter and EntityFilter objects. If from is set and to is set: match items where the timestamp (startTime , endTime , or lastUpdatedTime ) is between from and to inclusive. If from is set and to is not set: match items where the timestamp value is equal to or after from . If from is not set and to is set: match items where the timestamp value is equal to or before to .
            from (datetime) --The starting date and time of a time range.
            to (datetime) --The ending date and time of a time range.
            
            tags (list) --A map of entity tags attached to the affected entity.
            (dict) --
            (string) --
            (string) --
            
            statusCodes (list) --A list of entity status codes (IMPAIRED , UNIMPAIRED , or UNKNOWN ).
            (string) --
            

    :type locale: string
    :param locale: The locale (language) to return information in. English (en) is the default and the only supported value at this time.

    :type nextToken: string
    :param nextToken: If the results of a search are large, only a portion of the results are returned, and a nextToken pagination token is returned in the response. To retrieve the next batch of results, reissue the search request and include the returned token. When all results have been returned, the response does not contain a pagination token value.

    :type maxResults: integer
    :param maxResults: The maximum number of items to return in one batch, between 10 and 100, inclusive.

    :rtype: dict
    :return: {
        'entities': [
            {
                'entityArn': 'string',
                'eventArn': 'string',
                'entityValue': 'string',
                'awsAccountId': 'string',
                'lastUpdatedTime': datetime(2015, 1, 1),
                'statusCode': 'IMPAIRED'|'UNIMPAIRED'|'UNKNOWN',
                'tags': {
                    'string': 'string'
                }
            },
        ],
        'nextToken': 'string'
    }
    
    
    :returns: 
    (string) --
    (string) --
    
    
    
    """
    pass
