send message to azure service bus queue with postman

 using System;
 using System.Globalization;
 using System.Security.Cryptography;
 using System.Text;
 using System.Web;

 class MainClass
 {

     static readonly string queueOrTopicUrl = "TODO"; // Format: "https://<service bus namespace>.servicebus.windows.net/<topic name or queue>/messages";
     static readonly string signatureKeyName = "TODO";
     static readonly string signatureKey = "TODO";
     static readonly TimeSpan timeToLive = TimeSpan.FromDays(1);

     public static void Main(string[] args)
     {
         var token = GetSasToken(queueOrTopicUrl, signatureKeyName, signatureKey, timeToLive);
         Console.WriteLine("Authorization: " + token);
     }

     public static string GetSasToken(string resourceUri, string keyName, string key, TimeSpan ttl)
     {
         var expiry = GetExpiry(ttl);
         string stringToSign = HttpUtility.UrlEncode(resourceUri) + "\n" + expiry;
         HMACSHA256 hmac = new HMACSHA256(Encoding.UTF8.GetBytes(key));
         var signature = Convert.ToBase64String(hmac.ComputeHash(Encoding.UTF8.GetBytes(stringToSign)));
         var sasToken = String.Format(CultureInfo.InvariantCulture, "SharedAccessSignature sr={0}&sig={1}&se={2}&skn={3}",
         HttpUtility.UrlEncode(resourceUri), HttpUtility.UrlEncode(signature), expiry, keyName);
         return sasToken;
     }

     private static string GetExpiry(TimeSpan ttl)
     {
         TimeSpan expirySinceEpoch = DateTime.UtcNow - new DateTime(1970, 1, 1) + ttl;
         return Convert.ToString((int)expirySinceEpoch.TotalSeconds);
     }

 }