Electronic signatures on Smartsheet Forms

I was wondering if there is a solution yet for electronic signatures to be captured within a Smartsheet form. We have visitors and contractors that are required to sign in and out when they enter and leave the building. We are trying to reduce the abundance of paperwork by making this form electronic; however, due to compliance, we need to capture a signature from the visitor signing in. These visitors will only have access to the form and will not be able to receive emails or access the form log itself. Are there options for capturing signatures right from the form itself?