Below are SpringServe tags that can be used for testing.
https://tv.springserve.com/vast/703046?w=1920&h=1080&cb={{CACHEBUSTER}}&ip={{IP}}&ua={{USER_AGENT}}&pod_max_dur={{POD_MAX_DUR}}&pod_ad_slots={{POD_AD_SLOTS}}&app_bundle={{APP_BUNDLE}}&app_name={{APP_NAME}}&app_store_url={{APP_STORE_URL}}&did={{DEVICE_ID}}
https://tv.springserve.com/vast/703055?w=1920&h=1080&cb={{CACHEBUSTER}}&ip={{IP}}&ua={{USER_AGENT}}&app_bundle={{APP_BUNDLE}}&app_name={{APP_NAME}}&app_store_url={{APP_STORE_URL}}&did={{DEVICE_ID}}