I have checked xml response in Postman call. Here is response:
<netapp version='1.1' xmlns='http://www.netapp.com/filer/admin'>
<results status="passed">
<timestamp>1481632348</timestamp>
<instances>
<instance-data>
<name>/vol/test_vol1/test_lun01-BmRoB$IDc6tR</name>
<counters>
<counter-data>
<name>instance_name</name>
<value>/vol/test_vol1/test_lun01-BmRoB$IDc6tR</value>
</counter-data>
<counter-data>
<name>instance_uuid</name>
<value></value>
</counter-data>
...