playupchris

{
  ":self": "http://api.playup.com/external",
  ":type": "application/vnd.playup.provider.services+json",
  "user_finder": {
    ":href": "http://api.playup.com/external/users/{user_token}",
    ":type": "application/vnd.playup.external.user+json"
  }
}

playupchris

{
  ":type": "application/vnd.playup.extension+json",
  ":uid": "tile.photo.featured.1",
  ":display": {
    ":self": "http://www.zombo.com/tileupdates.json",
    ":type": "application/vnd.playup.display.feature.photo+json",
    "summary": "Photo Feature\nLorem ipsum dolor sit amet, consectetur adipisicing elit",
    "image": "http://www.footballfedvic.com.au/uploads/pics/BoxHill_South_Emily_Web.jpg",
    "footer_title": "Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.",
    "footer_subtitle": "Where sport gets social",

playupchris

(current_user = 5)
POST  /conversations/:id/invitations
{
  ":type": "application/vnd.playup.conversation.invitation+json",
  "to": {
     ":self": "http://localhost:8080/users/999",
     ":type": "application/vnd.playup.friend+json",
     ":uid": "friend-999"
  },
  "details": {