curl "https://api.phrase.com/v2/projects/:project_id/webhooks/:id/test" \
  -u USERNAME_OR_ACCESS_TOKEN \
  -X POST

{
  "id": "abcd1234cdef1234abcd1234cdef1234",
  "callback_url": "http://example.com/hooks/phraseapp-notifications",
  "description": "My webhook for chat notifications",
  "events": "locales:create,translations:update",
  "active": true,
  "include_branches": false,
  "created_at": "2015-01-28T09:52:53Z",
  "updated_at": "2015-01-28T09:52:53Z"
}