How to add contacts in contact list?

[waqas.geni]

How can I add Contact to contact list, I have reviewed the document api https://developer.genesys.cloud/routing/outbound/#post-api-v2-outbound-contactlists--contactListId--contacts but not getting what actually data I should post I am using laravel to post contact
Update I am posting below data
$jsonData = '[
{
"contactListId": "81b2sss",//hide it
"callable": true,
"data": {
"car": "John Doe",
"lead_id": "3172222221",
"milage": 500,
"name": "waqas",
"phone": "+923047580761"
}
}
]';
getting success response but I don't see these data in contact list api

[tim.smith]

If the request is successful and the contact is not being added to the contact list, please open a case with Genesys Cloud Care to investigate the issue. We do not have access to your org's data via the forum to perform this kind of investigation.