Nice work shipping this!
For anyone landing here who specifically needs a Brazilian e-sig flow (ICP-Brasil A1/A3 certificates, CPF/CNPJ signer fields, PT-BR locale, MP 2.200-2 legal compliance), I just published a related option: n8n-nodes-signdocs-brasil — wraps SignDocs Brasil. Different platform, same automation pattern (Sheets → sign → save evidence).
Announcement thread: SignDocs Brasil Community Node — ICP-Brasil A1/A3, biometric, OTP, and clickwrap signatures (MP 2.200-2)
Not trying to redirect traffic — DocuSign is the right call for most global flows. Just cross-referencing for BR-focused users who hit this thread first.