curl --request GET \
  --url https://api.tread-horizon.com/v1/add_ons/{id} \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "name": "<string>",
    "add_on_types": [
      "driver_pay"
    ],
    "quantity": "<string>",
    "cost_rate_value": "<string>",
    "revenue_rate_value": "<string>",
    "revenue_cost_rate_type": "RateForEach",
    "external_id": "<string>",
    "percentage": "<string>",
    "company": {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "tread_id": "ABC123",
      "legal_name": "<string>",
      "company_type": "hauler"
    },
    "accounting_id": "<string>",
    "rate": "<string>",
    "add_on_rate_type": "RateForEach",
    "taxable": false,
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z",
    "fuel_surcharge_schedule": {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>"
    }
  }
}