$uploadSession = $this->metaClient->request('POST', sprintf('%s/uploads', $this->metaAppId), [
            'query' => [
                'file_name' => $mediaObject->getFilePath(),
                'file_length' => $mediaObject->getContentSize(),
                'file_type' => $mediaObject->getMimeType(),
                'access_token' => $credential->getAccessToken(),
                'appsecret_proof' => $this->secretProof($credential->getAccessToken()),
            ],
        ])->toArray();

        if (!isset($uploadSession['id'])) {
            throw new BroadcastServiceProviderException('Error while creating upload session');
        }

        $handle = $this->metaClient->request('POST', '/' . $uploadSession['id'], [ // / is important see https://github.com/symfony/symfony/issues/54332
            'headers' => [
                'file_offset' => '0',
                'content-length' => $mediaObject->getContentSize(),
            ],
            'body' => $this->mediaStorage->readStream($mediaObject->getFilePath()),
            'query' => [
                'access_token' => $credential->getAccessToken(),
                'appsecret_proof' => $this->secretProof($credential->getAccessToken()),
            ],
        ])->toArray();

        return $handle['h'];
    }