curl --request GET \
  --url https://api4.kinbox.com.br/v3/custom-fields/{id} \
  --header 'Authorization: Bearer <token>'

{
  "id": "<string>",
  "_id": "<string>",
  "name": "<string>",
  "description": "<string>",
  "entity": "<string>",
  "placeholder": "<string>",
  "type": "<string>",
  "options": {},
  "isActive": true,
  "isDeleted": true,
  "invisible": true,
  "position": 123,
  "isUniqueIdentifier": true,
  "isIntegration": true,
  "showAlways": true,
  "requiredToResolve": true,
  "resetOnNewCall": true,
  "validate": {},
  "validation_mask": {},
  "validation_type": "<string>",
  "dependency": {},
  "isDependent": true,
  "workspaceId": 123,
  "createdAt": "2023-11-07T05:31:56Z",
  "lastUpdateAt": "2023-11-07T05:31:56Z",
  "updatedAt": "2023-11-07T05:31:56Z"
}