Theoretically it should be possible to create a Triggered Send without an underlying Triggered Send Data Extension. The JSON passed to messageDefinitionSends REST call should still be available to the email, where it can be parsed. The latter probably through a combination of SSJS and AmpScript. I have been trying to find examples of this approach, but unfortunately without any luck.
Does any of you have succeeded in building triggered sends without data extension, and with JSON from the messageDefinitionSends call parsed directly in the email? Is there any ressource out there describing this approach?
Thank you Brgds Lukas