{
  "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": "string" },
    "updated_at": { "type": "string" },
    "start_date": { "type": ["date", "null"] },
    "due_date": { "type": ["date", "null"] },
    "expired": { "type": ["boolean", "null"] },
    "web_url": { "type": "string" }
  },
  "additionalProperties": false
}
