The fee object

{
  "lago_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
  "lago_charge_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
  "lago_charge_filter_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
  "lago_invoice_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
  "lago_true_up_fee_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
  "lago_true_up_parent_fee_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
  "lago_subscription_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
  "lago_customer_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
  "external_customer_id": "external_id",
  "external_subscription_id": "external_id",
  "invoice_display_name": "Setup Fee (SF1)",
  "amount_cents": 100,
  "precise_amount": "1.0001",
  "precise_total_amount": "1.0212",
  "amount_currency": "EUR",
  "taxes_amount_cents": 20,
  "taxes_precise_amount": "0.20123",
  "taxes_rate": 20,
  "units": "0.32",
  "precise_unit_amount": "312.5",
  "total_amount_cents": 120,
  "total_amount_currency": "EUR",
  "events_count": 23,
  "pay_in_advance": true,
  "invoiceable": true,
  "from_date": "2022-04-29T08:59:51Z",
  "to_date": "2022-05-29T08:59:51Z",
  "payment_status": "pending",
  "created_at": "2022-08-24T14:58:59Z",
  "succeeded_at": "2022-08-24T14:58:59Z",
  "failed_at": "2022-08-24T14:58:59Z",
  "refunded_at": "2022-08-24T14:58:59Z",
  "event_transaction_id": "transaction_1234567890",
  "amount_details": {
    "graduated_ranges": [
      {
        "units": "10.0",
        "from_value": 0,
        "to_value": 10,
        "flat_unit_amount": "1.0",
        "per_unit_amount": "1.0",
        "per_unit_total_amount": "10.0",
        "total_with_flat_amount": "11.0"
      }
    ],
    "graduated_percentage_ranges": [
      {
        "units": "10.0",
        "from_value": 0,
        "to_value": 10,
        "flat_unit_amount": "1.0",
        "rate": "1.0",
        "per_unit_total_amount": "10.0",
        "total_with_flat_amount": "11.0"
      }
    ],
    "free_units": "10.0",
    "paid_units": "40.0",
    "per_package_size": 1000,
    "per_package_unit_amount": "0.5",
    "units": "20.0",
    "free_events": 10,
    "rate": "1.0",
    "per_unit_total_amount": "10.0",
    "paid_events": 20,
    "fixed_fee_unit_amount": "1.0",
    "fixed_fee_total_amount": "20.0",
    "min_max_adjustment_total_amount": "20.0",
    "volume_ranges": [
      {
        "per_unit_amount": "0.5",
        "flat_unit_amount": "10.0",
        "per_unit_total_amount": "10.0"
      }
    ]
  },
  "self_billed": false,
  "item": {
    "type": "subscription",
    "code": "startup",
    "name": "Startup",
    "invoice_display_name": "Setup Fee (SF1)",
    "filter_invoice_display_name": "AWS eu-east-1",
    "filters": {},
    "lago_item_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
    "item_type": "Subscription",
    "grouped_by": {}
  },
  "applied_taxes": [
    {
      "lago_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
      "lago_tax_id": "1a901a90-1a90-1a90-1a90-1a901a901a90",
      "tax_name": "TVA",
      "tax_code": "french_standard_vat",
      "tax_rate": 20,
      "tax_description": "French standard VAT",
      "amount_cents": 2000,
      "amount_currency": "USD",
      "created_at": "2022-09-14T16:35:31Z",
      "lago_fee_id": "1a901a90-1a90-1a90-1a90-1a901a901a90"
    }
  ]
}