put https://{environment}.neomode.com.br/sales/commerce/carts//seller/
In this method you set the seller in your cart. The seller id (sellerId) needs to inform in the Url
Some validations that occur in this method:
1 - Searching the seller was selected
2 - Checking if there are items available in this seller
3 - Separating the item quantity in the cart
4 - Searching and saving the modalities are supported by this seller