<?php

$url = "https://api.server.ru:22301/some/api/method";

$curl = curl_init($url);
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_POST, true);;
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

$headers = array();
$headers["Authorization"] = "Basic YWRtaWHMzl2Yzc=";
$headers["Content-Type"] = "application/json";

curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);

$data = <<<DATA
{"devices":[
  {"device_id": 28662}
  ]
}
DATA;

curl_setopt($curl, CURLOPT_POSTFIELDS, $data);

$resp = curl_exec($curl);
curl_close($curl);
var_dump($resp);