name (str): the name of an artist
description (str): A string describing the artist
style (str): A string describing the style/genre of the artist
mood (str): A string describing the mood of the artist
start (int): An integer starting value for the result set
results (int): An integer number of results to return
buckets (list): A list of strings specifying which buckets to retrieve
limit (bool): A boolean indicating whether or not to limit the results to one of the id spaces specified in buckets
fuzzy_match (bool): A boolean indicating whether or not to search for similar sounding matches (only works with name)
max_familiarity (float): A float specifying the max familiarity of artists to search for
min_familiarity (float): A float specifying the min familiarity of artists to search for
max_hotttnesss (float): A float specifying the max hotttnesss of artists to search for
min_hotttnesss (float): A float specifying the max hotttnesss of artists to search for
artist_start_year_before (int): Returned artists will have started recording music before this year.
artist_start_year_after (int): Returned artists will have started recording music after this year.
artist_end_year_before (int): Returned artists will have stopped recording music before this year.
artist_end_year_after (int): Returned artists will have stopped recording music after this year.
rank_type (str): A string denoting the desired ranking for description searches, either 'relevance' or 'familiarity'