Hello @zvitez
Thanks for reaching out to us.
Your catalog name should look like this: "catalog": "my-repository--your_store,"
For example, if your repository is called lorem and your Integration catalog is called my store, the value will be: "catalog": "lorem--my_store."
Please follow this guide: Integration Fields with Slice Machine
Let me know if you have any other questions.
Thanks,
Priyanka