Emulate github service hooks wih curl

I have a service listening to github service hooks, to perform automatic deployment. Sometimes I need to trigger this manually (without github intervention). For that, I am emulating the POST request that github is sending (post-receive-URLs). My data (`my.json`) looks like this (a limited subset of what github is sending - I do not need more): ``` { "action" : "deploy_from_scratch_with_bundle", "pusher" : { "email" : "my@email.com" }, "ref" : "refs/heads/master" } ``` And I try to POST with curl: ``` curl -X POST $URL --data-urlencode "@my.json" --header "Content-Type: application/x-www-form-urlencoded" ``` The problem is that github is POSTing like this: ``` payload=%7B%22pusher%22%3A%7B%22name%22%3A%22none%22%7D%2C%22repository%22%3 A%7B%22name%22%3A%liferay-plugins%22%2C%22created_at%22%3A%222011%2F12%2F07%2011%3A52... ``` See that `payload=` there? This looks like a form field. I do not know how to combine form fields with urlencoding. To POST form fields, I would do it like this: ``` curl -X POST $URL -F "payload=@my.json" ``` But the JSON would not be url encoded. How to I get both?