Response fields
objectResponse returned after successfully placing a complex order. AccountOrderRecord rows
for the legs are not created synchronously — they're hydrated by the next brokerage sync,
and can be queried later using the returned brokerage_group_order_id.
typestringThe complex order type that was placed.
brokerage_group_order_idstring or nullThe brokerage-assigned identifier that links all legs of this complex order together. Each leg will eventually appear as a separate AccountOrderRecord sharing this value. May be null if the brokerage does not return a group identifier.