Update order status to Shipped

[Servitel]

Hi to everybody. I'm new on API Shopify and I need to create a system to update order status to "shipped" after creating a parcel. These are the steps:

1) I retrieve orders list using the filter "financial_status=payed" and "updated_at:>yyyy-mm-dd"

2) for every order I collect the orderID and shipping details

3) I create a parcel and I receive back the tracking id

4) at this point I want to update the order status to "shipped" and insert the trackingid and url for tracking but I'm not able to find the method to obtain this under API docs (I have find how to insert tracking id and url but not how to update status)

Any help is very appreciated