Update Signature Request
POST https://api.hellosign.com/v3/signature_request/update/:signature_request_id
Updates the email address for a given signer on a signature request. You can listen for the "signature_request_email_bounce"
event on your app or account to detect bounced emails, and respond with this method.
Additional information can be found here.
Request Body
[{"name"=>"signature_id", "value"=>"", "datatype"=>"null"}, {"name"=>"email_address", "value"=>"alice@example.com", "datatype"=>"string"}]