How to parse body received as html request

I am using a node lib called request to get data from an api as below and i get all result in body now i need to parse this body and i have no idea on how to parse this body to get information

        request('http://ift.tt/1e91X73'+mov.imdb.id+'?     
        api_key=0ac03f4da6c7b6e181af8a4eafc6a1bb', function (error, response, body) {
      if (!error && response.statusCode == 200) {
         console.log(body);
    console.log(body.adult); // Show the HTML for the Google homepage. 
  }
})

body received is in following format

 body" '{"adult":false,"backdrop-path":"/somepath","poster-path:"somepath"}

How do i get values of let say poster-path from this body in my node code , i need help as soon as possible . Thanks