The message content, also referred to as payload, varies between message type and the data source. Below is an example of an image complete message from a GOES-R series satellite.

satellite_family GOES
satellite_ID G17
satellte_location GOES-West
instrument ABI
message_type image
status complete
start_time 2019-01-18 17:15:38.2
create_time 2019-01-18 17:26:19.6
end_time 2019-01-18 17:26:15.5
coverage Full Disk
medium adde
adde_dataset WESTA/FD
server_type sdi (TBD, updating to ‘realtime’)
DQF_percent_good_pixel 0.9973690
mode 3
signal_type grb
data_type RadF
band 15 (disregard for image complete events)
title ABI L1b Radiances
path /data/goes/grb/goes17/2019/2019_01_18_018/abi/L1b/RadF/OR_ABI-L1b-RadF-M3C??_G17_s2019018171538*.nc