What is Acilia ID

You will find references to an aciliaId in most API responses. This string is simply your 0x order encoded in a JWT token. Developers can store aciliaID in their own databases as if they were storing the entire 0x order, and can generate cancel and fill call-data by calling the API and passing in the appropriate aciliaId

Essentially, aciliaId is a safe representation of a 0x order that will doesn't expire.

You can always deserialize anaciliaId using JWT token libraries or the JWT debugger UI. Any aciliaId created from the Acilia NFT Swap API can be filled or cancelled without the need to the API.