FastAPI post request body, jsonlines of any number of jsons

Using FastAPI requires defining the Request Body. like this

class Item(BaseModel):
    catalog_item_number: str
    label: str

This accepts only one json per request. I want to make it accept any number of JSONs in the same body request

{"catalog_item_number":"xxxxxx", "label": "xxxxx"}
{"catalog_item_number":"xxxxxx", "label": "xxxxx"}
{"catalog_item_number":"xxxxxx", "label": "xxxxx"}
{"catalog_item_number":"xxxxxx", "label": "xxxxx"}
...etc