Add a library task of type Configurable form to a Worker Journey using REST API

Summary:

We have a library task of type configurable form (with a DFF) .

I need to understand if there is a way to use 1 single payload/ API call to create Journey, add a library task and the update the DFF information in that library task.

Right now, I'm able to achieve this with multiple API calls.

Content (required):

We have a library task of type configurable form (with a DFF) .

I need to understand if there is a way to use 1 single payload/ 1 single API call to create Journey, add a library task and the update the DFF information in that library task.