Unable to retrieve response id

Hi!
I am trying to retrieve the response id of the surveys in the JSON format, however this is how I am receiving the data:
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I took following steps in Postman to fetch the data:

1. POST https://*******.az1.qualtrics.com/API/v3/surveys/{suveyId}/export-responses/

BODY: {
     "format": "json"
}
(Received {exportProgressId})
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2. GET https://*******.qualtrics.com/API/v3/surveys/{surveyId}/export-responses/{exportProgressId}
(Received {fileId})
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3. GET /surveys/{surveyId}/export-responses/{fileId}/file
Received:
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What could be causing this issue and how to fix it?
Thank you