Schema Product markup to ACF custom fields Json

I use custom ACF repeated fields to show smartphone specifications to my blog. What i need is just to add schema product markup to the fields it's possible, so search engines can understand the specification table better. The JasonLD method.
You won't have any kind of access for this project, i will just send the php file it needs to be edit and help of-course to know which fields is used for what.

Don't copy paste proposals... Just let me know if you had experience with Schema markup and ACF plugin.