-u <operator_principal>:<password> \
-d slaveId=<slaveId> \
-d resources='[ \
{ \
	"name": "cpus", \
	"type": "SCALAR", \
	"scalar": { "value": 8 }, \
	"role": <roleName>, \
	"reservation": { \
	"principal": <operator_principal> \
} \
}, \
{ \
	"name": "mem", \
	"type": "SCALAR", \
	"scalar": { "value": 16384 }, \
	"role": <roleName>\
	"reservation": { \
	"principal": <operator_principal> \
} \
} \
]' \
-X POST http://<master_ip>:<master_port>/master/unreserve
