Unable to Submit Expense Itemization Record Through API

Summary:

Payload for expenses itemization failing with 400 Bad Request.

Content (required):

I am attempting to integrate a third-party application with Oracle Fusion expenses via the REST APIs. Creating an Expense Report works great. Creating an Expense Record without itemization works great. If I attempt to use /fscmRestApi/resources/11.13.18.05/expenses/{expensesUniqID}/child/ExpenseItemization, it fails. In the example below, expense item, 3000000002320, successfully created through the API, but adding an itemization fails.

I was following along here: https://docs.oracle.com/en/cloud/saas/financials/23c/farfa/op-expenses-expensesuniqid-child-expenseitemization-post.html

And here: https://community.oracle.com/customerconnect/discussion/577396/sample-rest-api-payload-to-submit-expense-report-with-itemization

Any assistance would be greatly appreciated.