When the mandate requires an electronic signature, the flow is as follows:

1. Register the mandate via POST /v2/moneyins/sdd/mandate — returns a documentId and mandate in Pending status (0)
2. Call Generate an Electronic Signature of a Document (POST /v2/accounts/{accountid}/documents/{documentid}/signinit) — returns a signDocument token
3. Redirect the end user to the Lemonway WebKit with the token as a GET parameter:
   • Sandbox: https://sandbox-webkit.lemonway.fr/{env}/dev/?signingtoken={signDocument}
   • Production: https://webkit.lemonway.fr/{env}/prod/?signingtoken={signDocument}
4. The debtor receives an OTP SMS, signs the mandate in the WebKit
5. The end user is redirected to returnUrl (success) or errorUrl (failure)
6. The mandate status transitions to Active (6)