Create a Document using Postman HTTP API request

I need to create a new document to my Azure Cosmos database container. The database name is mydb and container name is mycontainer. However, I get below response:

{"code":"Unauthorized","message":"The input authorization token can't serve the request. The wrong key is being used or the expected payload is not built as per the protocol. For more info: https://aka.ms/cosmosdb-tsg-unauthorized. Server used the following payload to sign: 'post\ndocs\ndbs/mydb/colls/mycontainer\nthu, 30 may 2024 19:58:15 gmt\n\n'\r\nActivityId: 66576818-49fa-4f99-8025-c967f67911dd, Windows/10.0.20348 cosmos-netstandard-sdk/3.18.0"}

My Postman request:

POST https://recently-viewed-dev.documents.azure.com/dbs/mydb/colls/mycontainer/docs

Headers:

x-ms-date: Thu, 30 May 2024 19:58:15 GMT

x-ms-version: 2018-12-31

Authorization: type%3Dmaster%26ver%3D1.0%26sig%3D%2Bw%........%2BTbL5xfZPxY5WLKfQ%2B%2B6LSI%3D

The Javascript code to generate the token is below. I noticed above payload to sign doesn't have docs in the end, but my Javascript does use full endpoint URL including docs in the end. Why am I getting Unauthorized response?

const fs = require("fs").promises;
require("dotenv").config();
const key = process.env.COSMOS_KEY || "<cosmos key>";
const endpoint = process.env.COSMOS_ENDPOINT || "<cosmos endpoint>";
var crypto = require("crypto");
  
function getAuthorizationTokenUsingMasterKey(verb, resourceType, resourceId, date, masterKey) {  
    var key = Buffer.from(masterKey, "base64");  
  
    var text = (verb || "").toLowerCase() + "\n" +   
               (resourceType || "").toLowerCase() + "\n" +   
               (resourceId || "") + "\n" +   
               date.toLowerCase() + "\n" +   
               "" + "\n";  
  
    var body = Buffer.from(text, "utf8");  
    var signature = crypto.createHmac("sha256", key).update(body).digest("base64");  
  
    var MasterToken = "master";  
    var TokenVersion = "1.0";  
    return encodeURIComponent("type=" + MasterToken + "&ver=" + TokenVersion + "&sig=" + signature);  
}
const verb = 'POST';
const resourceType = 'docs';
const resourceId = 'dbs/mydb/colls/mycontainer/docs';
const date = new Date().toUTCString();
const token = getAuthorizationTokenUsingMasterKey(verb, resourceType, resourceId, date, key);
console.log('Authorization token:', token);
console.log('Current date:', date);