I cannot find any detail of what to specify for the Facebook Developer App to enable PUBLISH_ACTIONS.
They are asking a number of questions on the REVIEW STATUS form, which i do not the answer to.
1. My app does not auto-populate the user message field
Pre-filling the user message field is against Platform Policy 2.3 All content has to be manually entered by the user.
Instead, use Open Graph Tags to customize your app content.
2. My app does not use the Facebook Feed Dialog or the Facebook Share Dialog to publish content
3. My app does not post to Facebook automatically
4. How is your app using publish_actions?
a. Lets people post to Facebook using a custom composer
b, Publishes Open Graph stories