Changes to Sub-account Futures Asset Transfer (For Master Account)

for the query request parameter futuresType, the format changed from no format to int32

for the query request parameter recvWindow, the format changed from no format to int64

for the query request parameter timestamp, the format changed from no format to int64

for the query request parameter amount, the format was generalized from float to double

the response property code became required for the status 400

the response property code became required for the status 401

the response property msg became required for the status 400

the response property msg became required for the status 401

the response property success became required for the status 200

the response property txnId became required for the status 200