收到描述函数名和参数的 JSON，程序怎样将它变成一次函数调用？

I have a function:

def multiply(a: int, b: int) -> int:
    """Multiply two numbers.

    Args:
        a: First integer
        b: Second integer
    """
    return a * b

And I receive a Json file document a function call to the above function:

{
  "action": "multiply",
  "args": [
    {"a": 3},
    {"b": 4}
  ]
}

How can I write a python code to automate the function call once I recieve the json file?