Can I use curly brackets "{" and "}" in the body of a message step?

**This post was created as part of a How to Service Request (SR)

Summary of the question:

We are trying to configure a message step in OFS with a body like this:

<anyTag>https://dummyurl.com/tracking/home?k={0}</anyTag >

However when trying to save it we receive a warning indicating that the body contains an incorrect label: {0}. The warning message allow us to save the configuration after that.

Is it fine to configure the message step even with this warning? Should it work, and would it work fine in future OFS versions?

Thank you.