Hey @desautelsj
I played around with the request body you sent, and I noticed that the name of your field is too long. If you remove one character, the request will go through.
I will flag this and share it with our Engineering team to see if it’s expected behavior and if it is, I will submit this to our Docs team to make changes in the docs
Thanks for looking into this and for letting me about the length limitation. Noting it in the docs would indeed be great but it would be even better if the API returned a more meaningful error message. Something along the lines of: You are attempting to set the name of a tracking field with a value that exceeds the 50 character count limit.