Name instead of E-Mail below the signature ?

Hello, I’m using the Acrobat Sign API, and in the signed document I receive, the email address appears below the signature. How can I display the signer’s name instead of the email address? I’d like to achieve this without modifying the original PDF document, and if possible, continue using the automatic placement of the signature field. I actually provide the signers name and e-mail in the json configuration file. How can I do to solve my problem ?