```python
from fastapi import FastAPI, Body
import helpers

app = FastAPI()


@app.post("/orders", status_code=201)
async def create_order(payload: dict = Body(...)):
    name = payload.get("item")
    # Assuming the payload is valid as per the spec; if not, we could raise an error.
    await helpers.aappend_audit_line(f"order:{name}")
    return {"status": "created"}
```