How to Use the H5P API to Import Generated Content?

I am currently developing a platform and have generated some quiz content (such as multimedia multiple-choice questions, memory games, drag-and-drop questions, etc.). I have formatted this content as JSON data, but I am unsure how to use the H5P API to import this data into the H5P system.

Specifically, I am unclear about how to construct the API request and how to correctly pass the data to ensure the content is successfully imported into H5P.

Would it be possible to provide any code examples or steps to guide me through the process of importing content using the API?
I would like to sincerely thank you for your help and support. Your assistance has been invaluable, and I truly appreciate your time and effort.