curl -i -X GET "https://api.box.com/2.0/metadata_templates?metadata_instance_id=01234500-12f1-1234-aa12-b1d234cb567e" \
     -H "authorization: Bearer <ACCESS_TOKEN>"

{
  "limit": 1000,
  "next_marker": "JV9IRGZmieiBasejOG9yDCRNgd2ymoZIbjsxbJMjIs3kioVii",
  "prev_marker": "JV9IRGZmieiBasejOG9yDCRNgd2ymoZIbjsxbJMjIs3kioVih",
  "entries": [
    {
      "id": "58063d82-4128-7b43-bba9-92f706befcdf",
      "type": "metadata_template",
      "scope": "enterprise_123456",
      "templateKey": "productInfo",
      "displayName": "Product Info",
      "hidden": true,
      "fields": [
        {
          "type": "string",
          "key": "category",
          "displayName": "Category",
          "description": "The category",
          "hidden": true,
          "options": [
            {
              "key": "Category 1",
              "id": "45dc2849-a4a7-40a9-a751-4a699a589190"
            }
          ],
          "taxonomyKey": "locationTaxonomy",
          "taxonomyId": "05ece6d7-fec4-4d3f-bfd2-36fd4dddea97",
          "namespace": "enterprise_123456",
          "optionsRules": {
            "multiSelect": true,
            "selectableLevels": [
              1,
              2
            ]
          },
          "id": "822227e0-47a5-921b-88a8-494760b2e6d2"
        }
      ],
      "copyInstanceOnItemCopy": true
    }
  ]
}