What music service did Jay-Z create for musicians?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q62766', 'id': 0, 'label': 'Jay-Z'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q365680', 'id': 1, 'label': 'assault'}, {'type': 'INTERNAL', 'name_': 'Q388785', 'id': 2, 'label': 'Flavor Flav'}, {'type': 'INTERNAL', 'name_': 'Q667548', 'id': 3, 'label': 'Death of a Dynasty'}], 'links': [{'name_': 'P1399', 'source': 2, 'target': 1, 'label': 'convicted of'}, {'name_': 'P161', 'source': 3, 'target': 0, 'label': 'cast member'}, {'name_': 'P161', 'source': 3, 'target': 2, 'label': 'cast member'}]}