I am using a json file to show data. 

```
  [{"id":3127,"creationTimestamp":"2018-10-22T13:57:08.000+0000","updateTimestamp":"2018-10-22T13:57:08.000+0000","status":"PENDING"}]

```

The json data above is working well. 

My service:

```
    export class SummaryService {
private baseurl='http://localhost:4200/assets/data.json'
constructor(private http: HttpClient) { }

getUsers() : Observable<any>{
   return this.http.get<User[]>(this.baseurl);

  }
}

```

My question is: How do I use the service above with the json format used below?

```
{"InvoiceHeaders":[{"id":3127,"creationTimestamp":"2018-10-22T13:57:08.000+0000","updateTimestamp":"2018-10-22T13:57:08.000+0000","status":"PENDING"}]}

```

My index file:

```
<ul> <li> {{user.id}}  <li>
<li> {{user.creationTimestamp}}</li>
</ul>

```

Please help me to display data using the array above (with "InvoiceHeaders").