set-node-hw-info not working for mac(net0, etc.)

[root@puppet4-razor-01 /]# razor nodes node1 hw_info

From https://localhost:8151/api/collections/nodes/node1:

  mac: [08-00-27-d9-2d-97]

razor set-node-hw-info --node node1 --hw-info net0=08:00:27:d9:2d:98

Error from doing POST https://localhost:8151/api/commands/set-node-hw-info

422 Unprocessable Entity

  error: hw_info must contain at least one of the match keys: mac

[root@puppet4-razor-01 /]# razor set-node-hw-info --node node1 --hw-info mac net0=08:00:27:d9:2d:98

Error: Invalid object for argument 'hw_info': 795: unexpected token at 'mac'

Try 'razor --help' for more information

[root@puppet4-razor-01 /]# razor set-node-hw-info --node node1 --hw-info net0=08:00:27:d9:2d:98 mac

Error from doing POST https://localhost:8151/api/commands/set-node-hw-info

404 Resource Not Found

  error: node must be the name of an existing node, but is 'mac'

[root@puppet4-razor-01 /]# razor set-node-hw-info --node node1 --hw-info mac=08:00:27:d9:2d:98

Error from doing POST https://localhost:8151/api/commands/set-node-hw-info

422 Unprocessable Entity

  error: extra attribute mac was present in hw_info, but is not allowed

[root@puppet4-razor-01 /]# razor set-node-hw-info --node node1 --hw-info mac0=08:00:27:d9:2d:98

Error from doing POST https://localhost:8151/api/commands/set-node-hw-info

422 Unprocessable Entity

  error: extra attribute mac0 was present in hw_info, but is not allowed