Sub account trade aggregation

SubAccountTradeAggregation

Similar to sub-account trade, but not divided by individual assets.

Name Lite	Type	Required Default	Description
sub_account_id sa	string	True	The sub account id
total_fee tf	string	True	Total fee paid
total_trade_volume tt	string	True	Total volume traded
num_traded nt	string	True	Number of trades
positive_fee pf	string	True	Total positive fee paid by user
signer s	string	True	The signer of the trade
realized_pnl rp	string	True	Realized PnL