Performance issues when using REST APIs from a smartphone

To obtain the list of users and their metadata, I perform the following operations:

Obtain the list of M-Files IDs according to object ID 624 (sample)
https://mfwebserver/REST/objects/624?limit=5000

I then need to loop for each M-Files ID and run this query to obtain the list of metadata
mfwebserver/.../624/<M-File ID>/properties

If I have 550 users, I need to run 551 queries !!!!

Is there a better solution?