ironic/api-ref/source/samples/volume-target-create-request.json

{
    "node_uuid": "6d85703a-565d-469a-96ce-30b6de53079d",
    "volume_type": "iscsi",
    "boot_index": 0,
    "volume_id": "04452bed-5367-4202-8bf5-de4335ac56d2"
}