Hi,
If you want to use the ALM Octane REST API you might find the GDPR Content Pack useful: The Content Pack Import Tool is an Excel workbook which contains a lot of - GDPR related - content like requirements, tests, defects, releases etc. Visual Basic for Applications (VBA) and the Octane REST API are used to import this content into ALM Octane (and ALM/QC via REST and OTA).
You can download the GDPR Content Pack - free of charge! - on the ADM Marketplace at
https://marketplace.microfocus.com/appdelivery/content/gdpr-content-pack
Please also have a look at the documentation: The Administration Guide explains how you can use the Import tool - and you'll find some hints how you can re-use the Import tool for your own purposes.
Cheers,
Dirk