curl --request POST \
  --url https://sbx.api.easybilling.cloud/payment-hub/api/usage-events \
  --header 'Content-Type: application/json' \
  --data '
[
  {
    "eventId": "ue-12345",
    "schemaName": "AI",
    "eventTime": "2026-03-02T20:53:19Z",
    "accountNumber": "ACC-0000000001",
    "attributes": [
      {
        "name": "model",
        "value": "GPT-5"
      },
      {
        "name": "token",
        "value": "101"
      }
    ]
  }
]
'

{
  "success": true,
  "errorMessage": "<string>",
  "successDetails": [
    {
      "eventId": "<string>"
    }
  ],
  "errorDetails": [
    {
      "eventId": "<string>",
      "errorMessage": "<string>"
    }
  ]
}