<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Models\PersonAnnotation;
use Microsoft\Graph\Beta\Generated\Models\ItemBody;
use Microsoft\Graph\Beta\Generated\Models\BodyType;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new PersonAnnotation();
$detail = new ItemBody();
$detail->setContentType(new BodyType('text'));
$detail->setContent('I am originally from Australia, but grew up in Moscow, Russia.');
$requestBody->setDetail($detail);
$requestBody->setDisplayName('About Me');
$result = $graphServiceClient->me()->profile()->notes()->post($requestBody)->wait();