How to post a photo to page wall as page's admin role via Graph API

_x000D_ _x000D_ I use node.js to handle Graph API, and post feed, link normally on the Facebook page wall. But if I post a photo to page, it cannot use page role. The photo will be posted with my Facebook user, and shown on the other side. So, how can I post a photo to page wall with page role via Graph API -- POST https://graph.facebook.com/#{page_id}/photos?access_token=#{access_token} With Parameters { message: 'the message' url: 'the image url' } OR use multipart/form-data { message: 'the message' source: 'post file' } same result, help please. The access token has manage_pages, public_stream permissions. Useful feed post POST https://graph.facebook.com/#{page_id}/feed?access_token=#{access_token} { message: 'something interesting' } this will show on page's wall as page role