{
  "version": 1,
  "type": "activity",
  "sessionRef": {
    "scid": "bd6c41c3-01c3-468a-a3b5-3e0fe8133862",
    "templateName": "deathmatch",
    // The session name is optional in a POST; if not specified, MPSD fills in a GUID.//
    "name": "session-49"
  },
}

{
  // Common handle fields
  "id: "47ca0049-a5ba-4bc1-aa22-fcf834ce4c13",
  "version": 1,
  "type": "invite",
  "sessionRef": {
    "scid": "bd6c41c3-01c3-468a-a3b5-3e0fe8133862",
    "templateName": "deathmatch",
    "name": "session-49"
   },
   "inviteAttributes": {
     "titleId" : {titleId}, // The title being invited to, in decimal uint32. This value is used to find the title name and/or image.
     "context" : {context}, // The title defined context token. Must be 256 characters or less when URI-encoded.
     "contextString" : {contextstring}, // The string name of a custom invite string to display in the invite notification.
     "senderString" : {sender} // The string name of the sender when the sender is a service.
   },
   "invitedXuid": "3210",
}