Sending HTML Content as Attachment to Sales Cloud via OIC

Hello,

I’m developing an integration that receives an HTML response from a REST API.
This HTML content needs to be sent to Oracle Sales Cloud as an attachment to an account record, using OIC.

I'm currently referencing the following REST API for this purpose:

Below is an example of the HTML response we receive from the external API:

Could you please confirm if it’s possible to send this HTML as an attachment using OIC and this endpoint?
If so, what are the required steps or best practices to achieve it?

Thank you very much for your help.

Best regards,