<?php


$url         = 'http://snd.dev/app_dev.php/api/rest/email-list/contacts-batch/update';
$accessToken = 'MzUxMTNhN2E5YjRhN2E1NWM5NTU4ZDRhZDc5M2YzNTE=';
$data        = json_encode([
    'emailListId' => '5853a843f015272a0442c1b1',
    'contacts'    => [
        [
            'email'      => "aion.planet.com@gmail.com",
            'parameters' => [
                'name'      => "test1",
                'email'     => "eve.planet.com@gmail.com",
                'variables' => [
                    [
                        'name'  => "var1",
                        'value' => "aion.planet.com@gmail.com",
                    ],
                ],
            ],
        ],
        [
            'email'      => "eve.planet.com@gmail.com",
            'parameters' => [
                'name'      => "test2",
                'variables' => [
                    [
                        'name'  => "var2",
                        'value' => "eve.planet.com@gmail.com",
                    ],
                ],
            ],
        ],
    ],
]);

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'Content-Type: application/json',
    'Content-Length: ' . strlen($data),
    sprintf('access-token: %s', $accessToken),
]);

var_dump(curl_exec($ch));