Adobe sign REST API is not reading the signature field from transient document

I am uploading a transient document using Adobe sign REST API. The transient document is multi-page PDF document which already contains signature field in each page. But Adobe sign is not considering these signature fields and inserting it's own signature field at the end of document.

How could I configure that in "AgreementCreationInfo"  and make Adobe sign to use the existing signature fields in transient document and not insert a new one.