Quotes when path contains space

This rclone script is getting an error.
Destination path is in single quotes because it contains a space.
This is the rclone_space_in_path.sh script:

#!/usr/bin/env sh

cmd="rclone sync '/Volumes/Oliver/User Library' /run/media/wolfv/big_stick/test_rclone_backup --dry-run"  #usage msg, but works from terminal
echo "cmd=$cmd"
echo exit_code=$exit_code

It gets a “Command sync needs 2 arguments maximum” error when run from the Linux termanal:

$ ./rclone_space_in_path.sh
cmd=rclone sync '/Volumes/Oliver/User Library' /run/media/wolfv/big_stick/test_rclone_backup --dry-run
  rclone sync source:path dest:path [flags]

  -h, --help   help for sync

Global Flags:
      --acd-templink-threshold int          Files >= this size will be downloaded via their tempLink. (default 9G)
  -v, --verbose count[=-1]                  Print lots more stuff (repeat for more)
Command sync needs 2 arguments maximum

When I copy the same rlcone command directly into the terminal, it works:

$ rclone sync '/Volumes/Oliver/User Library' /run/media/wolfv/big_stick/test_rclone_backup --dry-run
2018/08/03 22:19:51 ERROR : : error reading source directory: directory not found
2018/08/03 22:19:51 ERROR : Local file system at /run/media/wolfv/big_stick/test_rclone_backup: not deleting files as there were IO errors

Why does the same rclone command not work from the script?
I am using rclone v1.42 on Linux.

From https://rclone.org/docs/
If your names have spaces … then you must quote them. Use single quotes ’ by default.

The problem here is about quoting within bash scripting which is complicated an error prone in my experience!

This should fix it

eval $cmd

instead of just

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Thanks ncw. That worked!

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