curl --request PUT \
  --url https://api.hubapi.com/integrators/timeline/v3/{appId}/event-templates/{eventTemplateId}/tokens/{tokenName} \
  --header 'Content-Type: application/json' \
  --data '{
  "label": "petType edit",
  "options": [
    {
      "value": "dog",
      "label": "Dog"
    },
    {
      "value": "cat",
      "label": "Cat"
    },
    {
      "value": "bird",
      "label": "Bird"
    }
  ]
}'

{
  "name": "petType",
  "type": "enumeration",
  "createdAt": "2020-02-12T20:58:26Z",
  "updatedAt": "2020-02-12T20:58:26Z",
  "label": "Pet Type",
  "options": [
    {
      "value": "dog",
      "label": "Dog"
    },
    {
      "value": "cat",
      "label": "Cat"
    },
    {
      "value": "bird",
      "label": "Bird"
    }
  ]
}