android - Django Rest Framework + gson : utf-8 can't decode -

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I am working with Django Rest Framework to build my API and with Android + GSON in my client side I am working. There is a problem with encoding when I try to send a POST with a field "country" and the value "Peru". I got the error: 

  {"detail": "JSON parse error - 'utf8' codec can not decode byte 0xfa in position 15: invalid start byte"}

I have changed a parameter in my post with it: 

  postRequest.setEntity (New String Entity (GS.N.Togson (object), HTTP.UTF_8);

The server does not return the same error to me, but it throws an HTTP 500 error. Is there a way to manage it in the client or server side? Which one do you recommend?


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