{
  "type": "object",
  "properties" : {
    "id": { "type": "integer" },
    "iid": { "type": "integer" },
    "project_id": { "type": ["integer", "null"] },
    "group_id": { "type": ["integer", "null"] },
    "title": { "type": "string" },
    "description": { "type": ["string", "null"] },
    "state": { "type": "string" },
    "created_at": { "type": "date" },
    "updated_at": { "type": "date" },
    "start_date": { "type": "date" },
    "due_date": { "type": "date" },
    "web_url": { "type": "string" }
  },
  "required": [
    "id", "iid", "title", "description", "state",
    "state", "created_at", "updated_at", "start_date", "due_date"
  ],
  "additionalProperties": false
}