How to get the value coming from Response

I have a deadlock in getting a JSON of my return that I can not read it in any way I have already tried in several ways I will show below how the code is now and what I need to do.

My Component method where it is returning what I want.

  onSubmit(loginUsuario, senhaUsuario) {

    this.usuarioService.login(loginUsuario, senhaUsuario).subscribe(
       data => {
         if (data[0].res.status == 200) {

           this.usuario : Usuario = new Usuario(data[0].res._body.code, data[0].res._body.message)

           this.toastr.success("Teste", this.usuario.message);
         } else if (data[0].res.status == 500) {
           this.toastr.error("Teste", data.toString());
         }
         //data => this.data = data,
         //err  => this.erro = <any>err
       },
       error => {
         console.log(error);
       }
    );
  }
}

In my console typing date [0], I need to get Code and Message:

date [0] {res: Response} res : Response {_body: "{" code ": 0," message ":" Test "}, status: 200, ok: true, statusText:" OK " proto : Object

I set my Service like this:

  login(loginUsuario: string, senhaUsuario: string): Observable<Response> {
    return this.http.get(this.apiUrl + '/login/' + loginUsuario + '/senha/' + senhaUsuario)
      .map((res:Response) => res.json())
      .catch((error:any) => Observable.throw(error.json().error || 'Server error'));
  }

It worked but I need to get here in the component the status:

  onSubmit(loginUsuario, senhaUsuario) {

    this.usuarioService.login(loginUsuario, senhaUsuario).subscribe(
       data => {
         //if (data[0].res.status == 200) {

           //this.usuario : Usuario = new Usuario(data[0].res._body.code, data[0].res._body.message)

           this.toastr.success("Teste", data.message);
         //} else if (data[0].res.status == 500) {
           //this.toastr.error("Teste", data.toString());
         //}
         //data => this.data = data,
         //err  => this.erro = <any>err
       },
       error => {
         console.log(error);
       }
    );
  }

Solution:

My Component:

  onSubmit(loginUsuario, senhaUsuario) {

    this.usuarioService.login(loginUsuario, senhaUsuario).subscribe(
      data => {

        if (data.status == 200) {
          this.data = data.json();
          this.toastr.success("Teste", this.data.message);
        }
      },
      error => {
        console.log(error);
      }
    );
  }

My Service:

  login(loginUsuario: string, senhaUsuario: string): Observable<Response> {
    return this.http.get(this.apiUrl + '/login/' + loginUsuario + '/senha/' + senhaUsuario)
      .map((res:Response) => res)
      .catch((error:any) => Observable.throw(error.json().error || 'Server error'));
  }