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

{
  "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>"
    }
  ]
}