AngularJS 1.4.x

var app = angular.module('plunker', []);

app.controller('MainCtrl', function($scope) {
  $scope.arr = [
    {
      json: {
              doc: {
                   id: 1,
                   atualizacao:{
                               dc: false
                   }
              }
        }
    }
];

angular.forEach($scope.arr, function(v) {
    if(v.json.doc.id === 1){
       v.json.doc.atualizacao.dc = true;
    }
});


});

<!DOCTYPE html>
<html ng-app="plunker">

  <head>
    <meta charset="utf-8" />
    <title>AngularJS Plunker</title>
    <script>document.write('<base href="' + document.location + '" />');</script>
    <link rel="stylesheet" href="style.css" />
    <script data-require="angular.js@1.4.x" src="https://code.angularjs.org/1.4.9/angular.js" data-semver="1.4.9"></script>
    <script src="app.js"></script>
  </head>

  <body ng-controller="MainCtrl">
    <p>{{arr[0].json.doc.atualizacao.dc}}</p>
  </body>

</html>

/* Put your css in here */