Access keys of a Json object in a twig file

Hi,

I have a REST response that looks like this:

Array
(
    [0] => Array
        (
            [nid] => 24503
            [title] => 13.10
            [field_gita_10589_text] => Array
                (
                    [content] => some value

                          )

)

the key [field_gita_10589_text] is not fixed, and will change depending on checkboxes selected on a form. 

I have a twig file in which I am accessing the field_gita_10589_text.content like this:

<div class="container">
<h1> {{ data.field_gita_10589_text.content}} </h1>

But right now I am hard coding it. Since this is always the third key in the response, is there a way in which I can access just the third key in the response?

Thanks,