Freckle API entries error

entry.js

{
  "entry":{
    "minutes": "25min",
    "date": "2011-07-25",
    "description": "one, two",
    "user": "gcappellotto@letsfreckle.com"
  }
}

output.txt

* About to connect() to gcappellotto.letsfreckle.com port 80 (#0)
*   Trying 173.45.229.8... connected
* Connected to gcappellotto.letsfreckle.com (173.45.229.8) port 80 (#0)
> POST /api/entries.json HTTP/1.1
> User-Agent: curl/7.19.7 (i386-apple-darwin10.2.0) libcurl/7.19.7 OpenSSL/0.9.8l zlib/1.2.3
> Host: gcappellotto.letsfreckle.com
> Accept: */*
> Content-type: application/json
> X-FreckleToken:MY_APP_TOKEN
> Content-Length: 112
> 
< HTTP/1.1 422 Unprocessable Entity
< Date: Mon, 25 Jul 2011 23:30:59 GMT
< Server: Apache
< X-Powered-By: Phusion Passenger (mod_rails/mod_rack) 3.0.6
< X-Runtime: 20
< Cache-Control: no-cache
< Content-Length: 1
< Status: 422
< Vary: Accept-Encoding
< Content-Type: text/html; charset=utf-8
< 
* Connection #0 to host gcappellotto.letsfreckle.com left intact
* Closing connection #0

post.sh

curl -d @entry.js -H "Content-type: application/json" -H "X-FreckleToken:MY_APP_TOKEN" http://gcappellotto.letsfreckle.com/api/entries.json