code: public static void constructSignatureForRequestParameters(List<NameValuePair> params, String secretKey) {
          constructSignatureForRequestParameters(params, secretKey, System.currentTimeMillis() / 1000);
      }
docs: Signs a set of request parameters.
  <p>
  Generates additional parameters to represent the timestamp and generated signature.
  Uses the supplied pre-shared secret key to generate the signature.
  
  @param params List of NameValuePair instances containing the query parameters for the request that is to be signed
  @param secretKey the pre-shared secret key held by the client