How to get nested for loop, bash correctly constructed? [duplicate]

I am trying to use a nested loop so that I can get the urls I desire, while also renaming the downloaded files to be unique. I am not getting something right.

The outcome is that I have unique file names (exactly like I want), but then they all have the same content, not at all what I want.

Here is what I have:

for image_name in `cat $IMAGE_TEST`;
do
  for manifest_url in `cat $MANIFEST_URL_LIST`;
  do
     curl -H "Authorization: Bearer $KC_ACCESS_TOKEN" $manifest_url > \
     manifests/$image_name.json
  done 
done 

I have also tried:

for image_name in `cat $IMAGE_TEST`;
do
  while read -r manifest_url
  do
    curl -H "Authorization: Bearer $KC_ACCESS_TOKEN" $manifest_url > \
    mainifests/$image_name.json
  done < $MANIFEST_URL_LIST
done 

and other combinations of this, but seem to be not seeing what I am missing. Please help!