curl --request POST \
  --url https://api-m.sandbox.paypal.com/v1/commerce/billing/events \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "transaction_id": "txn_1234567890abcdef",
  "external_subscription_id": "sub_1234567890abcdef",
  "metric_code": "event_code_123456",
  "timestamp": "2023-01-01T00:00:00Z",
  "properties": {}
}
'

{
  "transaction_id": "event_1753818829",
  "metric_code": "91624203-791a-4639-8c86-4693948b3a41",
  "external_subscription_id": "d2d628e8-e7fb-412f-b09c-7f70ee58b50a",
  "timestamp": "2025-07-29T12:53:49.076-07:00",
  "properties": {
    "gb": 10
  },
  "id": "d80447f2-0f34-4612-86ae-152160dc66c5",
  "created_at": "2025-07-29T12:53:49-07:00"
}

{
  "name": "INVALID_REQUEST",
  "message": "Request is not well-formed, syntactically incorrect, or violates schema.",
  "debug_id": "dc99e3955cdd8",
  "details": [
    {
      "field": "/email",
      "value": "abc",
      "location": "body",
      "issue": "INVALID_PARAMETER_VALUE",
      "description": "The value of a field does not conform to the expected format."
    }
  ]
}

{
  "name": "NOT_AUTHORIZED",
  "message": "Authorization failed due to insufficient permissions.",
  "debug_id": "565f78f101498",
  "details": [
    {
      "issue": "PERMISSION_DENIED",
      "description": "You do not have permission to access or perform operations on this resource."
    }
  ]
}

{
  "name": "UNPROCESSABLE_ENTITY",
  "message": "The requested action could not be performed, semantically incorrect, or failed business validation.",
  "debug_id": "90957fca61718",
  "details": [
    {
      "field": "/email",
      "value": "sdfwdj@sdfs.com",
      "location": "body",
      "issue": "UNSUPPORTED_EMAIL",
      "description": "The email provided is not supported."
    }
  ]
}

{
  "name": "INTERNAL_SERVER_ERROR",
  "message": "An internal server error has occurred.",
  "debug_id": "90957fca61718"
}