Create a new order on the SubAccount
Method: "order.place"
Params
{
productId: uint32,
account: string,
subAccountId: uint8,
isBuy: bool,
orderType: uint8,
timeInForce: uint8,
price: string,
quantity: string,
nonce: uint64,
expiry uint64,
signature: string
}
Result
"OK"
For more info regarding signature generation view here