Angular2/http (ПОСТАВКА)

addHero(name: string): Observable<Hero>{
        let body= JSON.stringify({name});
        let headers = new Headers();
        headers.append('Accept','application/json');
        headers.append('Content-Type','application/json');

        let options = new RequestOptions({ headers: headers });

        console.log(body);
        return this.http.post(this.heroesUrl, body, options).map(this.extractData).catch(this.handleError)
        //return new Observable(name=>{id:3; name:name})
    }