If you want to pass your token, simply append "&oauth_token=" + TOKEN_VALUE
https://api.soundcloud.com/tracks/11111111?client_id=12345666666&oauth_token=YOUR_TOKEN
Edited to add example code
Here is an example of PUT using Curl & with PHP for soundcloud auth token. This code is from a working soundcloud project.
$data = array(
'code' => $token,
'client_id' => $this->getClientId(false), // your client ID
'client_secret' => $this->getClientSecret(), // your client secret
'redirect_uri' => $this->getCallback(), // callback URL
'grant_type' => 'authorization_code'
);
$url = "https://api.soundcloud.com/oauth2/token";
try {
$ch = curl_init();
// set options
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_VERBOSE, 1);
$response = curl_exec($ch);
$header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
$header = substr($response, 0, $header_size);
$body = substr($response, $header_size);
// read / process result
curl_close($ch);
} catch(Exception $e) {
// error handling...
}