gdax调用返回返回消息禁止的php

Question

嗨，我正在尝试使用php进行api调用，但是当我使用post方法时，我会得到

{"message":"invalid signature"}

当我使用get方法时它有效，但是我不确定如何输入额外的参数（id） 如果您可以帮助我解决发布问题或使用参数id重新创建get请求，我将非常满意

链接到api文档https://docs.pro.coinbase.com/

这是我的代码

$secret = "xxxxxxxxxxxxxxxxxxxxxxxxxxx..............";
$key = 'xxxxxxxxxx.............';
$passphrase = 'xxxxxxx...';

$time = time();

$method = "POST";
$path = "/accounts";
$url = "https://api.prime.coinbase.com".$path;
$body = array(
'id' => "xxxxxxxxxxxxxx............"
);

$data = $time.$method.$path.json_encode($body);
$sign = base64_encode(hash_hmac("sha256", $data, base64_decode($secret), 
true));

$headers = array(
'CB-ACCESS-KEY: '.$key,
'CB-ACCESS-SIGN: '.$sign,
'CB-ACCESS-TIMESTAMP: '.$time,
'CB-ACCESS-PASSPHRASE: '.$passphrase,
'Content-Type: application/json'
);

$userAgent = $_SERVER['HTTP_USER_AGENT'];

$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_USERAGENT, $userAgent);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($body));
curl_setopt($ch, CURLOPT_URL, $url);
$res = curl_exec($ch);

echo $res;