InvalidRegistration在php中发送推送

我正在尝试在我的android应用程序上发送推送通知，但我始终收到错误：

“无效登记”

这是我在“收件人”中发送的令牌

我的密码：-

 public function android_push($token, $load, $key) {

    $url = 'https://fcm.googleapis.com/fcm/send';

    $fields = array(
        'registration_ids' => $token,
        'data' => $load
    );
    $headers = array(
        'Authorization: key=' . $key,
        'Content-Type: application/json'
    );
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields, true));
    $result = curl_exec($ch);
        if ($result === FALSE) {
        die('Curl failed: ' . curl_error($ch));
    }
    curl_close($ch);

我的爱人：

   {"title":"Test","msg":"test"}
token: ["pid_58cc-6fed***"]
key:AA*****zEoEbsgPZCjK_umqrmgMZRkpyN7BAA5MNfGuojQP5olWIe1H_vzU8-9THNcB-CgZAjA6fwL72yE******6V7Cl-IObLDGwA6SqTopuK96begUtysy_cG8rc02vdIeYx**** 

结果:

{“多播id”：4723735099133341876，“成功”：0，“失败”：1，“规范id”：0，“结果”：[{“错误”：“无效注册”}]}

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pid.*

在我看来不是有效的注册令牌，你确定它是正确的吗？我不知道如何判断它是否正确؟