Update

curl --request PUT \
  --url https://api.incident.io/v2/custom_fields/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "description": "Which team is impacted by this issue",
  "filter_by": {
    "catalog_attribute_id": "01H2FW182TAH0NHEVBY34SCAK0",
    "custom_field_id": "01H2FW182TAH0NHEVBY34SCAK0"
  },
  "group_by_catalog_attribute_id": "01FCNDV6P870EA6S7TK1DSYDG0",
  "helptext_catalog_attribute_id": "01H2FW182TAH0NHEVBY34SCAK0",
  "name": "Affected Team"
}
'

{
  "custom_field": {
    "catalog_type_id": "01FCNDV6P870EA6S7TK1DSYDG0",
    "created_at": "2021-08-17T13:28:57.801578Z",
    "description": "Which team is impacted by this issue",
    "field_type": "single_select",
    "filter_by": {
      "catalog_attribute_id": "01H2FW182TAH0NHEVBY34SCAK0",
      "custom_field_id": "01H2FW182TAH0NHEVBY34SCAK0"
    },
    "group_by_catalog_attribute_id": "01FCNDV6P870EA6S7TK1DSYDG0",
    "helptext_catalog_attribute_id": "01H2FW182TAH0NHEVBY34SCAK0",
    "id": "01FCNDV6P870EA6S7TK1DSYDG0",
    "name": "Affected Team",
    "updated_at": "2021-08-17T13:28:57.801578Z"
  }
}