It seems like you're experiencing an issue where the JSON data sent from a webhook to a Prefect deployment is being converted into a string with unwanted escape characters. To help you resolve this, I'll provide a solution based on the Prefect version you're using. Could you please let me know whether you're using Prefect 2.x or Prefect 3.x? If you're unsure, you can also give me more context about your setup, and I can help determine the version for you.