How to pass key value pairs from metadata dynamically to a rest connection in OIC

Summary: I have an integration where I need to create a customer in Stripe account using Rest Connection. I need to pass required fields to the rest in order to create a customer in Stripe account. Some of the fields consists of metadata which has multiple key value pairs. How to pass those key value pairs from the metadata dynamically to the stripe rest connection in OIC?

Content (required):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):

Source: Below example is key value pairs from metadata which are required in order to create a customer in Stripe Account