Александр

var isArray = Array.isArray || function (arr) {
  return Object.prototype.toString.call(arr) === "[object Array]";
}

var isObject = function (obj) {
  return Object.prototype.toString.call(obj) === "[object Object]";
}

function three (tr) {
  var paths = [];

  function findPath(branch, str) {
    Object.keys(branch).forEach(function (key) {
      if (isArray(branch[key]) || isObject(branch[key]))
        findPath(branch[key], str ? str + "." + key : key);
      else
        paths.push(str ? str + "." + key : key);
    });    
  }

  findPath(tr, "");
  return paths;
}

[
  "MainService.0.Id", 
  "MainService.0.Name", 
  "MainService.0.MainService.0.Id", 
  "MainService.0.MainService.0.Name", 
  "MainService.0.MainService.0.Service.0.Id", 
  "MainService.0.MainService.0.Service.0.Name"
]

var request = new XMLHttpRequest();
request.open('POST', '/my/url', true);
request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
request.onreadystatechange = function() {
  if (this.readyState === 4) {
    if (this.status >= 200 && this.status < 400) {
      // Success!
      var resp = this.responseText;
    } else {
      // Error :(
    }
  }
};
request.send(data);

A UUID is designed as a number that is globally unique in space and time. Two calls to UUID() are expected to generate two different values, even if these calls are performed on two separate computers that are not connected to each other.

110E8400-E29B-11D4-A716-446655440000

110E8400E29B11D4A716446655440000