creating Payables invoices using REST API need to GET POST notes that are on the invoice header

Summary: We are creating Payables invoices in APEX and using REST API to create the invoice header and lines. There does not seem to be any mention of the notes field in the REST APIs. We need to be able to GET and POST the notes just like any other field on the header. I can't find any documentation regarding notes for Payables. I can see it is included on REST API receivables, but not Payables. The table used to store the notes is zmm_notes. Any assistance is much appreciated. Thank you.

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