linnworks update price

linnworksUpdatePrice.php

function updatePrice($itemId, $price, $title) {
    $header = array('Host' => 'eu1.linnworks.net',
        'Connection' => 'keep-alive',
        'Accept' => 'application/json, text/javascript, */*; q=0.01',
        'Origin' => 'https://www.linnworks.net',
        'User-Agent' => 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.90 Safari/537.36',
        'Content-Type' => 'application/x-www-form-urlencoded; charset=UTF-8',
        'Referer' => 'https://www.linnworks.net/',
        'Authorization' => '6f004779-0784-45bd-86b5-7bec6bc475',
        'Accept-Encoding' => 'gzip, deflate');
    $url = 'https://eu1.linnworks.net//api/Inventory/UpdateInventoryItemPrices';
    $options = array("timeout"=> 60);
    $data = 'inventoryItemPrices=[
          {
            "Price": '. $price . ',
            "Source": "' . $itemId . '",
            "SubSource": "' . $title . '",
            "StockItemId": "1364a381-3d2e-be94-2343-943b049e24ff"
          },
      ]';
    $response = Requests::post($url, $header, $data, $options);
    return $response;
}