curl -i -X POST "https://api.box.com/2.0/metadata_templates/schema" \
     -H "authorization: Bearer <ACCESS_TOKEN>" \
     -H "content-type: application/json" \
     -d '{
       "templateKey": "securityClassification-6VMVochwUWo",
       "scope": "enterprise",
       "displayName": "Classification",
       "hidden": false,
       "copyInstanceOnItemCopy": true,
       "fields": [
         {
           "type": "enum",
           "key": "Box__Security__Classification__Key",
           "displayName": "Classification",
           "hidden": false,
           "options": [
             {
               "key": "Classified",
               "staticConfig": {
                 "classification": {
                   "colorID": 7,
                   "classificationDefinition": "Top Seret"
                 }
               }
             }
           ]
         }
       ]
     }'

{
  "id": "58063d82-4128-7b43-bba9-92f706befcdf",
  "type": "metadata_template",
  "scope": "enterprise_123456",
  "templateKey": "securityClassification-6VMVochwUWo",
  "displayName": "Classification",
  "fields": [
    {
      "id": "822227e0-47a5-921b-88a8-494760b2e6d2",
      "type": "enum",
      "key": "Box__Security__Classification__Key",
      "displayName": "Classification",
      "options": [
        {
          "id": "46aea176-3483-4431-856c-6b5b13d1cc50",
          "key": "Sensitive",
          "staticConfig": {
            "classification": {
              "classificationDefinition": "Sensitive information",
              "colorID": 4
            }
          }
        }
      ],
      "hidden": false
    }
  ],
  "hidden": false,
  "copyInstanceOnItemCopy": true
}

{
  "type": "error",
  "status": 400,
  "code": "item_name_invalid",
  "message": "Method Not Allowed",
  "context_info": {
    "message": "Something went wrong"
  },
  "help_url": "https://developer.box.com/guides/api-calls/permissions-and-errors/common-errors/",
  "request_id": "abcdef123456"
}

{
  "type": "error",
  "status": 400,
  "code": "item_name_invalid",
  "message": "Method Not Allowed",
  "context_info": {
    "message": "Something went wrong"
  },
  "help_url": "https://developer.box.com/guides/api-calls/permissions-and-errors/common-errors/",
  "request_id": "abcdef123456"
}

{
  "type": "error",
  "status": 400,
  "code": "item_name_invalid",
  "message": "Method Not Allowed",
  "context_info": {
    "message": "Something went wrong"
  },
  "help_url": "https://developer.box.com/guides/api-calls/permissions-and-errors/common-errors/",
  "request_id": "abcdef123456"
}