Add maximum timestamp to the payload. am: f8527ada7b  -s ours am: 962bfa3b27  -s ours am: ace31a8858  -s ours am: 58183c9d7a  -s ours am: 15ad0e9ec9  -s ours am: 0ae64f6c59  -s ours am: 06b4dc98c8  -s ours am: f9cfa8c9a4  -s ours
am: 33f7c8631e  -s ours

Change-Id: I0759033545bf0bdcfc676d5fd53a76d7f79a1fa6