Trustpilot AFS 2.0 --> how to collect product reviews?

[Shambola]

Hi!

I'm trying to run AFS on prestashop.
For now I've solved the bcc mail issue and Structured Data Snippets in the Prestashop order confirmation mail:

<script type="application/json+trustpilot">
{
  "recipientName": "{firstname} {lastname}",
  "recipientEmail": "{email}",
  "referenceId": "{order_name}",
}
</script>

Now comes the difficult part... how do I enter the JSON of the product information?

https://support.trustpilot.com/hc/en-us/articles/221618467-Structured-Data-Snippet-for-Automatic-Feedback-Service-AFS-#product-reviews

Anybody get that?

Thank you!

Alessandro