curl --request GET \
  --url http://localhost/api/v3/tiers/definitions/{definition}

{
  "data": {
    "id": 123,
    "name": "<string>",
    "handle": "<string>",
    "is_floor": "<string>",
    "value_min": 123,
    "value_maintain": 123,
    "is_assignable": true,
    "internal_notes": "<string>",
    "description": "<string>",
    "short_description": "<string>",
    "long_description": "<string>",
    "terms_conditions": "<string>",
    "icon": "<string>",
    "image_url": "<string>",
    "earn_instructions": "<string>",
    "disable_credit": true,
    "tags": [
      "<string>"
    ],
    "meta": [
      "<unknown>"
    ],
    "region_id": 123,
    "region": {
      "id": 123,
      "name": "<string>",
      "handle": "<string>",
      "is_default": true,
      "currency": "<string>",
      "created_at": "<string>",
      "updated_at": "<string>"
    },
    "created_at": "<string>",
    "updated_at": "<string>"
  }
}