Hi Victore,
Sorry for the delay in response.
As I have checked the email address that you used to log in to the forums, I see that you are using the Adobe Sign Developer account.
As you have a query related to Adobe Sign integration, it can be best answered by the pre-sales team.
I would suggest you to contact the pre-sales team. They will be able to provide pre-sales technical assistance to you.
Please refer to this link Adobe Sign plans for individuals and businesses | Adobe Document Cloud to get in contact with them.
Hope that helps.
Let us know if you need any help.
Regards,
Meenakshi