WP HTTP API call response

This my solution:

$url="##MYURL##?api_token=##APIKEY##";
$args = array(
    'headers' => array( '','cache-control' => 'no-cache', 'content-type' => 'application/json' ),
    'body' => '{"pass":{"serial_number":"123456","Name":"Michele","Date":"2017/11/11","Type":"Abb.Annuale","Issued":"Genn.2016","Al":"Dic.2018","Number":"0123456789412"}}',
);
$response = wp_remote_post( $url, $args );

$body = wp_remote_retrieve_body( $response );
var_dump($body);