I get a transaction from UNKNOWN, how can I return money to him?
{u'block_num': 2405006,
u'created_time': u'2015-04-29T05:27:40',
u'extra_addresses': [],
u'fee': {u'amount': 50000, u'asset_id': 0},
u'index': 371,
u'is_confirmed': True,
u'is_market': False,
u'is_virtual': False,
u'ledger_entries': [{u'amount': {u'amount': 1000000, u'asset_id': 359},
u'from_account': None,
u'memo': u'',
u'memo_from_account': None,
u'to_account': u'BTS6AwgEDxjpedzuvicV8jUn9yz8yUpmxobXDNzGJG8fR5GsA7fYt'}],
u'received_time': u'2015-04-29T05:27:40',
u'record_id': u'71fac9cadafc4054601b854224543f5645bb55f8',
u'trx': {u'expiration': u'2015-04-29T06:34:53',
u'operations': [{u'data': {u'amount': 1000000,
u'balance_id': u'BTSMuo3zkLDEqUJJdDstQByf9nUkgxWXqdHQ',
u'claim_input_data': u''},
u'type': u'withdraw_op_type'},
{u'data': {u'amount': 50000,
u'balance_id': u'BTSQJeXgzagpmZKNy2jmoZApJMenjyUZXqjf',
u'claim_input_data': u''},
u'type': u'withdraw_op_type'},
{u'data': {u'amount': 1000000,
u'condition': {u'asset_id': 359,
u'data': {u'memo': None,
u'owner': u'BTS6wJym2gbfkgJSe8AZe6M8xy9c52bxKddJ'},
u'slate_id': 0,
u'type': u'withdraw_signature_type'}},
u'type': u'deposit_op_type'}],
u'reserved': None,