But I am obtaining a blank page in return. It seems that the reason it is created blank is because I have no content as widgets in the JSON payload I am using to create the new page.
That is why I would like to know where, from an existing template, I can find a corresponding JSON payload example in order to create a non empty landing page.
When looking to create a page with content, you would first need to ensure that the template path is pointing to a template with content widgets. Next, I'd suggest for you to use this endpoint: Get a Page by ID | COS Page Publishing API so that you can easily have an idea of what to include in the widget/widget containers property so that moving forward when you're updating the page or creating another page, you may include the widget/widget containers property so that the page isn't blank.
Thank you for your response, I also tried to ad the "widget" content in my JSON payload while creating the new page.
Still I have an error with the template, I want to use one on path "template_path": "Marketplace/Neambo/Act21/Templates/Act21 LP 1 Col Hero.html", but I get the error in my newly created page settings (see screenshot).
Would it be possible to send you an e-mail with all the links of the page and template used so you may investigate the issue?