quicknotes/db/note.php

<?php
namespace OCA\QuickNotes\Db;

use JsonSerializable;

use OCP\AppFramework\Db\Entity;

class Note extends Entity implements JsonSerializable {

	protected $title;
	protected $content;
	protected $color;
	protected $userId;

	public function jsonSerialize() {
		return [
			'id' => $this->id,
			'title' => $this->title,
			'content' => $this->content,
			'color' => $this->color
		];
	}
}