What privilege role is required to update the AR Invoice header DFF attribute1 using REST API?

Summary:

We are attempting to update the Descriptive Flexfield (DFF) attribute1 on the Accounts Receivable (AR) Invoice Header using the Oracle Fusion REST API(/receivablesInvoices/{CustomerTransactionId}/child/receivablesInvoiceDFF).

1. What specific privilege is required for a user to successfully perform this update?
2. We understand that roles such as Accounts Receivable Manager or Specialist can perform this action. However, the user we are using for the REST API is an integration user, and we prefer not to assign full access roles. We would like to grant only the minimum required privilege to allow this user to update the DFF.
3. Are there any