Problem using publishUserAction method to post to profile - php

Question

I am using gigya php sdk, It works well I am able to post to user's wall or profile using socialise.setStatus method but I am have problems when I try to use the publishuseraction method. I get an error Invalid request signature.
$method = "socialize.publishUserAction";
$request = new GSRequest($apiKey,$secretKey,$method);
$userAction = new GSDictionary("{\"title\":\"This is my title\", \"userMessage\":\"This is a user message\", \"description\":\"This is a description\", \"linkBack\":\"http://google.com\", \"mediaItems\":[{\"src\":\"http://www.f2h.co.il/logo.jpg\", \"href\":\"http://www.f2h.co.il\",\"type\":\"image\"}]}");
$request->setParam("userAction", $userAction);
$request->setParam("uid", $userUID);
$response = $request->send();
if($response->getErrorCode()==0){
echo "Success";
} else {
echo ("Error: " . $response->getErrorMessage());
}
UPDATED AFTER USING $response->getLog()
apiMethod=socialize.publishUserAction
apiKey=correct_api_key
params={"userAction":{},uid":"MY_UID","format":"json","httpStatusCodes":"false"}
URL=http://socialize.gigya.com/socialize.publishUserAction postData=uid=urlencoded(MY_UID)&format=json&httpStatusCodes=false&apiKey=correct_api_key×tamp=1296229876&nonce=1.29622987636E%2B12&sig=HEdzy%2BzxetV8QvTDjdsdMWh0%2Fz8%3D
server= web504
I used both put method
$userAction = new GSDictionary();
$userAction->put("title", "This is my title");
$userAction->put("userMessage", "This is my user message");
$userAction->put("description", "This is my description");
$userAction->put("linkBack", "http://google.com");
$mediaItems = array();
$mediaItems[0] = new GSDictionary("{\"src\":\"http://www.f2h.co.il/logo.jpg\", \"href\":\"http://www.f2h.co.il\",\"type\":\"image\"}");
& JSON method
$userAction = new GSDictionary("{\"title\":\"This is my title\", \"userMessage\":\"This is a user message\", \"description\":\"This is a description\",
\"linkBack\":\"http://google.com\", \"mediaItems\":[ {\"src\":\"http://www.f2h.co.il/logo.jpg\", \"href\":\"http://www.f2h.co.il\",\"type\":\"image\"}]}");
I get the same error. And User action is empty using both methods. I appreciate any help.
Thanks.

Answer 1

Try calling getLog() for a bit more information about the error:
if($response->getErrorCode()==0){
echo "Success";
} else {
echo ("Error: " . $response->getErrorMessage());
print "<pre>";
print_r($response->getLog());
print "</pre>";
}
Also, are you able to run getUserInfo w/ the SDK? This is a simple test that also requires a signature. Use the example on the PHP SDK page (about 1/2 way down).