To pass BCS serialized struct parameters, you cannot directly create new struct instances as they must be created through move calls. This is because allowing direct creation would enable arbitrary objects or coins to be passed in without restrictions. For a move module to manage how its structs are created, your contract needs to implement a method specifically for constructing the struct. This ensures control over the creation process and maintains integrity.

You can refer to more detailed instructions on passing inputs to a transaction in this guide: Passing Inputs to a Transaction.