curl --request POST \
  --url https://api.paygentic.io/v0/usage \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "idempotencyKey": "<string>",
  "entitlementId": "<string>",
  "customerId": "<string>",
  "merchantId": "<string>",
  "timestamp": "2023-11-07T05:31:56Z",
  "properties": [
    {
      "billableMetricId": "<string>",
      "quantity": 123,
      "price": "<string>"
    }
  ],
  "metadata": {}
}'

{
  "id": "<string>",
  "object": "usageEvent",
  "idempotencyKey": "<string>",
  "customerId": "<string>",
  "description": "<string>",
  "merchantId": "<string>",
  "consumerId": "<string>",
  "subscriptionId": "<string>",
  "entitlementId": "<string>",
  "timestamp": "2023-11-07T05:31:56Z",
  "createdAt": "2023-11-07T05:31:56Z",
  "properties": [
    {
      "billableMetricId": "<string>",
      "quantity": 2,
      "price": "<string>"
    }
  ],
  "metadata": {},
  "billing": {
    "price": 123,
    "billingEventId": "<string>"
  }
}