curl -i -X PUT "https://api.box.com/2.0/files/12345/metadata/global/boxSkillsCards" \
     -H "authorization: Bearer <ACCESS_TOKEN>" \
     -H "content-type: application/json-patch+json" \
     -d '[
       "op": "replace",
       "path": "/cards/0",
       "value": {
         "type": "skill_card",
         "skill_card_type": "keyword",
         "skill_card_title": {
           "code": "license-plates",
           "message": "Licence Plates"
         },
         "skill": {
           "type": "service"
           "id": "license-plates-service"
         },
         "invocation": {
           "type": "skill_invocation"
           "id": "license-plates-service-123"
         },
         "entries": {
           { "text": "DD-26-YT" },
           { "text": "DN86 BOX" }
         }
       }
     ]'

{
  "$canEdit": true,
  "$id": "01234500-12f1-1234-aa12-b1d234cb567e",
  "$parent": "folder_59449484661,",
  "$scope": "enterprise_27335",
  "$template": "properties",
  "$type": "properties-6bcba49f-ca6d-4d2a-a758-57fe6edf44d0",
  "$typeVersion": 2,
  "$version": 1,
  "cards": [
    {
      "type": "skill_card",
      "skill_card_type": "keyword",
      "skill": {
        "type": "service",
        "id": "image-recognition-service"
      },
      "invocation": {
        "type": "skill_invocation",
        "id": "image-recognition-service-123"
      },
      "entries": [
        {
          "text": "keyword1"
        }
      ],
      "created_at": "2018-04-13T13:53:23-07:00",
      "skill_card_title": {
        "message": "Labels",
        "code": "labels"
      }
    }
  ]
}