Creating Notes with Engagements results in "metadata cannot be null"

[MCKLtech]

We've hitting the following error when creating a note via the engagement end point:

Client error: POST https://api.hubapi.com/engagements/v1/engagements resulted in a 400 Bad Request response:
{"status":"error","message":"metadata cannot be null","correlationId":"XYZ}

Example Code:

$engagement = [
            "active" => true,
            "type" => "NOTE",
            "timestamp" => time() * 1000
        ];

        $assoc = [];
        $assoc[] = ["contactIds" => [123456]];

$note = $this->client->engagements()->create($engagement, $assoc, ["body" => "My note is here"])->getData();

[ksvirkou-hubspot]

Hi @MCKLtech
Below workable example

$engagement = [
    "active" => true,
    "type" => "NOTE",
    "timestamp" => time() * 1000
];

$assoc = [];
$assoc['contactIds'] = [8451];

$note = $hubSpot->engagements()->create($engagement, $assoc, ["body" => "My note is here"]);