Не могу найти простую ошибку

$instance = "399fcvgbh";
$token = "dfxtf";
 
 
 
$array = array(
    
   "template" => "uved",
    "language" => array(
        "policy" => "deterministic",
        "code" => "ru"
    ),
    "namespace" => "namespace_id",
    "params" => array(
        "0" => array(
            "type" => "header",
            "parameters" => array(
                "0" => array(
                    "type" => "image",
                    "image" => "https://yand.org/primer.jpg"
                )
            )
        ),
        "1" => array(
            "type" => "body",
            "parameters" => array(
                "0" => array(
                    "type" => "text",
                    "text" => "test"
                ),
                 "1" => array(
                    "type" => "text",
                    "text" => "test"
                ),
                 "2" => array(
                    "type" => "text",
                    "text" => "test"
                )
            )
        )
    ),
    "phone" => "7967657657"
);
 
 
 
 
    $data_string = json_encode($array );
 
    $ch = curl_init("https://api.chat-api.com/instance$instance/sendFile?token=$token");
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/json");
 
    $result = curl_exec($ch);
    echo $result;

curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/json");

curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/json"));