signed_request.js

function makeSignedRequest() {
  var params = {'person': 1, 'context':100};
  params[gadgets.io.RequestParameters.AUTHORIZATION] = gadgets.io.AuthorizationType.SIGNED;
  params[gadgets.io.RequestParameters.CONTENT_TYPE] = gadgets.io.ContentType.TEXT;
  params[gadgets.io.RequestParameters.METHOD] = gadgets.io.MethodType.POST;
  var url = "http://www.test.com/resource";
  gadgets.io.makeRequest(url,authResponse, params);
}
function authResponse(data) {
  for(var i in data) {
    alert(i+'='+data[i]);
  }
}