Yes, the first 3 bytes are the manufacturer. However, there are several special values for the first byte of those 3:
7D = Non-commercial, not released to the public. For educational, research, etc. You should not find these "in the wild".
7E = Universal Exclusive ID (Non-Real Time)
7F = Universal Exclusive ID (Real Time)
Data for the 2 Universal Exclusive ID types are found in MIDI Specifications.
When you have 3 bytes to identify a specific manufacturer, the manufacturer gets to define all bytes that follow, then close with the F7.
A list of manufacturer IDs is here: https://www.midi.org/specifications-old/item/manufacturer-id-numbers
From that table, your example message is apparently meant for use by Artisan Classic Organ Inc.
You can only discover the meaning of the bytes after that ID in any information that Artisan might publish.
Products designed by Artisan Classic Organ and any products designed specifically to work with a product by Artisan will know what the data means.
Other MIDI products which do now "know" the message design by Artisan are not supposed to act in response to the message.