How to extract a json entry without jq in bash if I know the start and end patterns?

Question

I have a piece of json where I would like to extract a text entry string from:

{"choices":[{"text":" price for that\n\nSpend full price for that.","index":0,"logprobs":null}],"usage":{"prompt_tokens":13}}

I know that the text always starts with "choices":[{"text": and ends with ,"index". Is there a way I can use native bash tools to extract whatever is in the middle? For the above, I would want to extract " price for that\n\nSpend full price for that." as the string. Thanks