I'm trying to build a solution in Oracle Fusion App Composer using Sandbox. I need a user-enterable form where the user can select a customer and their bank details from Fusion, and additionally fill in other information such as contract number, date, expiry info, rates, and contact persons, then save the records. I'm couldn't understand how to use Fusion REST services inside App Composer objects as a list of values. Can anyone suggest a way to achieve this without using any other development tools?