How to read json into variable?

How can I read a json into a variable to be used throughout http file, i.e as in:

# myrequest.http content
< {%
    import readFile from './readFile.js';
    client.global.set("DATA", readFile('data.json'));
%}
POST http://localhost/api/v1/model
Content-Type: application/json

{{DATA}}

POST http://localhost/api/v2/model
Content-Type: application/json

{{DATA}}