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$arFiles = [];
    $arFile = [];
    //make array multiple files for add to custom field
    if(!empty($_FILES['FILES']['tmp_name']) && is_array($_FILES['FILES']['tmp_name'])){
        foreach($_FILES['FILES']['tmp_name'] as $k=>$path){
            $arFiles[] = [
                "fileData" => [
                    $_FILES['FILES']['name'][$k],
                    base64_encode(file_get_contents($path))
                ]
            ];
        }
    }
    //make file array for add to custom field
    if(!empty($_FILES['FILE']['tmp_name'])){
        $arFile = [
            "fileData" => [
                $_FILES['FILE']['name'],
                base64_encode(file_get_contents($_FILES['FILE']['tmp_name']))
            ]
        ];
    }
    //Форматируем Phone и почту для сохранения
    $arPhone = (!empty($sPhone)) ? array(array('VALUE' => $sPhone, 'VALUE_TYPE' => 'WORK')) : array();
    $arEmail = (!empty($sEmail)) ? array(array('VALUE' => $sEmail, 'VALUE_TYPE' => 'HOME')) : array();

    $result = CRest::call(
        'crm.lead.add',
        [
        'fields' =>[
            'TITLE' => 'From the site: '.implode(' ',[$sName,$sLastName]),//*Lead Name[string]
            'NAME' => $sName,//Name[string]
            'UF_CRM_1551350435588' => $arFiles,
            'UF_CRM_1551362436225' => $arFile,
            'LAST_NAME' => $sLastName,//Last name[string]
            'PHONE' => $arPhone,//Phone[string]
            'EMAIL' => $arEmail,//E-mail[string]
        ]
    ]);
    if(!empty($result['result'])){
        echo json_encode(['message' => 'Lead add']);
    }elseif(!empty($result['error_description'])){
        echo json_encode(['message' => 'Lead not added: '.$result['error_description']]);
    }else{
        echo json_encode(['message' => 'Lead not added']);
    }

$fileId = 3046560;
$f = \CFile::MakeFileArray(fileId);
//make file array for add to custom field
$arFile = [];
$f['tmp_name'] = '/home/bitrix/www/upload/form/not_image/626/h2pzuskusux91ay0kc3jp2j1h0iop5pw/тех спец обслуж орг техн 2022.docx';
$f['tmp_name'] = 'https://site.kz/upload/form/not_image/626/h2pzuskusux91ay0kc3jp2j1h0iop5pw/тех спец обслуж орг техн 2022.docx';
if(!empty($f['tmp_name'])){
    $arFile = [
        "fileData" => [
          $f['name'],
          base64_encode(file_get_contents($f['tmp_name']))
        ]
    ];
}
// $comments .= print_r($f, true);
$arFields = array(
    'TITLE' => '$sTitle',
    'NAME' => '$sName',
    'COMMENTS' => '$comments',
    'UF_CRM_1642363264' => $arFile,
    'ASSIGNED_BY_ID' => 13581,
    'CREATED_BY_ID' => 13581,
);
if(Loader::includeModule('crm')){
    $options['REGISTER_SONET_EVENT'] = true;
    $options['CURRENT_USER'] = 1;
    $o = new \CCrmLead(false);
    $entityId = $o->add($arFields, $bUpdateSearch = true, $options);
}