Message

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Message",
  "type": "object",
  "properties": {
    "id": {
      "type": "integer"
    },
    "subject": {
      "type": "string"
    },
    "body": {
      "type": "string"
    },
    "user_id": {
      "type": "integer",
      "description": "ID of the user to whom this message belongs. Messages work like email,\nso the sender gets a copy and the recipient gets a copy of each\nmessage. This is always the authenticated user, so there's no real\nneed for a full user object.\n"
    },
    "to_user": {
      "$ref": "#/definitions/User"
    },
    "from_user": {
      "$ref": "#/definitions/User"
    },
    "thread_id": {
      "type": "integer",
      "description": "Identifier for the message thread, generally the ID of the sender's\ncopy of the first message\n"
    },
    "thread_messages_count": {
      "type": "integer",
      "description": "Number of messages in this thread. Only included when threads=true\n"
    },
    "thread_flags": {
      "type": "array",
      "description": "Array of flags on messages in this thread. Only included when\nthreads=true\n",
      "items": {
        "type": "object"
      }
    }
  }
}