Error 400 Bad request : invalid_parameter

Can someone tell me why I keep getting the following error :

Array
(
    [type] => error
    [status] => 400
    [code] => bad_request
    [context_info] => Array
        (
            [errors] => Array
                (
                    [0] => Array
                        (
                            [reason] => invalid_parameter
                            [name] => entity-body
                            [message] => Invalid value 'name=MyNewFolder&parent%5Bid%5D=0'. Entity body should be a correctly nested resource attribute name/value pair
                        )

                )

        )

    [help_url] => http://developers.box.com/docs/#errors
    [message] => Bad Request
    [request_id] => ***number removed for privacy***59ea0034d0d42
)

$newfolderurl="https://api.box.com/2.0/folders";
$dataVC = array(
    'name' => 'MyNewFolder',
    'parent' => array(
            'id' => '0',
        )
    );
$headers=array(
    "Authorization: $oauth"
    );
$curl = curl_init();
curl_setopt_array($curl, array(
    CURLOPT_URL => $newfolderurl,
    CURLOPT_HTTPHEADER => $headers,
    CURLOPT_POST => TRUE,
    //CURLOPT_HTTPGET => TRUE,
    CURLOPT_POSTFIELDS => http_build_query( $dataVC ),
    CURLOPT_RETURNTRANSFER => 1,
    CURLOPT_SSL_VERIFYPEER => FALSE,
    CURLOPT_SSL_VERIFYHOST => FALSE
));
$response = curl_exec($curl);
$json_response = json_decode( $response, TRUE );
curl_close($curl);