3. Save the signature_request_id from #2 - you'll need it later!
4. Open the claim_url from #2 within the iFrame by calling the HelloSign.open() method with url parameter set as the claim_url. Be sure to use the same client_id you used in #1.
5. Your user completes the document setup in the iFrame and sends it to the signers.
6. When you receive the signature_request_sent callback event, use the signature_request_id you saved in #3 in the Get Signature Request endpoint. See our Callbacks Walkthrough for more information on handling these events.
7. Save the signature_id from the Get Signature Request response for the signer(s). The signature_id is unique to each signer on the document. Not to be confused with the signature_request_id, which is the unique identifier for the entire signature request.
8. Use the signature_id from #7 in the Get Embedded Sign URL endpoint.
9. From the response object in #8, open the sign_url returned in the iFrame. The signer who opens this URL in the iFrame is able to complete the document.