title: How can I parse ruby json request
body: <p>I'm using api request/response on my rails app. To update avatar i've got this request(i took it from development.log file)</p>
  
  <pre><code>Started PUT "/user/avatars.json" for 127.0.0.1 at 2017-07-18 11:47:57 +0300
  Processing by AvatarsController#update as JSON
    Parameters: {"avatar"=&gt;#&lt;ActionDispatch::Http::UploadedFile:0x007fe6cbedae18 @tempfile=#&lt;Tempfile:/var/folders/n3/5_nb_zks2k91r5ngcmb4fm9r0000gn/T/RackMultipart20170718-26576-1vss7hh.png&gt;, @original_filename="Снимок экрана 2017-07-16 в 21.55.05.png", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"avatar\"; filename=\"\xD0\xA1\xD0\xBD\xD0\xB8\xD0\xBC\xD0\xBE\xD0\xBA \xD1\x8D\xD0\xBA\xD1\x80\xD0\xB0\xD0\xBD\xD0\xB0 2017-07-16 \xD0\xB2 21.55.05.png\"\r\nContent-Type: image/png\r\n"&gt;}
  </code></pre>
  
  <p>Now, I need to send this request from POSTMAN application. But it uses ruby syntax like <strong><em>=></em></strong>. How can I convert it to json to use in POSTMAN?</p>