What is this structure coming from a fetch that returns a octet-stream?

Question

I'm tring to retrieve a list of files from an API using axios, in Node.js. What I get is what I assume is an ArrayBuffer string. I'm using the following code:

axios.get('http://api.com/filesList').then(response => {
    console.log(response.data);
});

This is what I get (changed numbers and letters a bit to hide potential priv info):

$97cceb28↕$sad28sdj-askd-3294-3jh9→--Account_123456789 �����0*$97cceb282¶2022-11-30.csv"�☺
$97cceb28↕$sad28sdj-askd-3294-3jh9→--Account_123456789 ���0*$97cceb282¶2022-11-26.csv"�☺
$97cceb28↕$sad28sdj-askd-3294-3jh9→--Account_123456789 �໑�0*$97cceb282¶2022-11-19.csv"�☺

I know for a fact that I'm supposed to receive certain information for each file of this list, at least which account is associated to them and their name. I did a little digging and added responseType: 'arraybuffer' to the function and then it output a <Buffer 22 be 01...> kind of response. I then tried a method to convert it to a string but I end up getting the result I had without setting the response type.

So, what kind of string data is this and how do I convert it to an object/JSON? Is there a way to decode this structure?

Thank you all in advance.