Api sub account trade response

Name `Lite`	Type	Required `Default`	Description
result `r`	[SubAccountTrade]	True	The sub account trade result set for given interval

Name `Lite`	Type	Required `Default`	Description
start_interval `si`	string	True	Start of calculation epoch
sub_account_id `sa`	string	True	The sub account id
instrument `i`	string	True	The instrument being represented
total_fee `tf`	string	True	Total fee paid
total_trade_volume `tt`	string	True	Total volume traded