User role for remote command

Hi all,

 I'm trying to disable some members from a bash script in a remote server using a curl command

curl --insecure -u operator:operator -H "Content-Type: application/json" -X PUT https://myf5.ipaddress.com/mgmt/tm/ltm/pool/Pool_01/members/~Common~member01:80 -d '{"session":"user-disabled","state":"user-down"}'

 This works fine while you are using a user with admin privileges but I don't like this. I want to limit permissions but when I change it form administrator to another role (operator, manager, resource administrator ... etc) and send the command, returns a error message:

"code":401,"message":"Authorization failed: 

I thing that I'm doing something wrong because I thing that it's not possible that a user to make this job must have all privileges than a administrator

 Someone has tried something like this and works fine ? Wich role have configured ??

Best Regards. Jose.