// Build JSON payload
JsonNodeFactory nodeFactory = JsonNodeFactory.instance;
ObjectNode rootNode = nodeFactory.objectNode();
{
// Header
ObjectNode header = nodeFactory.objectNode();
header.put("client", "mobileshark");
header.put("clientRevision", "20120830");
header.put("country", session.getCountry());
header.put("privacy", 0);
header.put("session", session.getPhpSession());