@cakeToken = JWT.encode(   {     "iss" => sellerIdentifier,     "aud" => "Google",     "typ" => "google/payments/inapp/item/v1",     "exp" => (Time.now + 3600).to_i,     "iat" => Time.now.to_i,     "request" => {       "name" => "Piece of Cake",       "description" => "Virtual chocolate cake to fill your virtual tummy",       "price" => "10.50",       "currencyCode" => "USD",       "sellerData" => "user_id:1224245,offer_code:3098576987,affiliate:aksdfbovu9j"     }   },   SELLER_SECRET )