Required request body content is missing

Merhaba yazdığım kodda şöyle bir hata alıyorum

"timestamp": 1444028010758,
  "status": 400,
  "error": "Bad Request",
  "exception": "org.springframework.http.converter.HttpMessageNotReadableException",
  "message": "Required request body content is missing: org.springframework.web.method.HandlerMethod$HandlerMethodParameter@7e3680ed"