Structure and fields of events in Audit Logs

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JSON structure

{
  "id": "ba989c6d-d6fb-***",
  "source": "nebius.registry.v1.RegistryService/Update",
  "specversion": "1.0",
  "type": "ai.nebius.registry.registry.update",
  "service": {
    "name": "REGISTRY"
  },
  "action": "UPDATE",
  "time": "2025-03-25T17:29:22.024775156Z",
  "event_version": "1.04",
  "authentication": {
    "authenticated": true,
    "subject": {
      "tenant_user_id": "tenantuseraccount-***",
      "service_account_id": "serviceaccount-***",
      "name": "Jane Doe"
    },
    "federation": {
      "id": "federation-***",
      "name": "Acme Inc."
    },
    "authentication_type": "ACCESS_TOKEN",
    "token_credential": {
      "masked_token": "ne1cV***"
    },
    "static_key": {
      "id": "NAKI3UCA***"
    }
  },
  "authorization": {
    "authorized": true
  },
  "resource": {
    "metadata": {
      "id": "registry-***",
      "name": "test-registry",
      "type": "registry"
    },
    "hierarchy": [
      {
        "id": "tenant-***",
        "name": "tenant-***",
        "type": "tenant"
      },
      {
        "id": "project-***",
        "name": "test-project",
        "type": "project"
      }
    ],
    "state": {
      "previous": {
        "metadata": { ... },
        "spec": { ... },
        "status": { ... }
      },
      "current": {
        "metadata": { ... },
        "spec": { ... },
        "status": { ... }
      }
    }
  },
  "request": {
    "request_id": "481f7089-f6b0-***",
    "parameters": { ... },
    "idempotency_id": "38bceb03-610a-***",
    "trace_id": "313d***"
  },
  "response": {
    "status_code": "RESOURCE_EXHAUSTED",
    "error_message": "",
    "payload": { ... }
  },
  "status": "ERROR",
  "project_region": {
    "name": "eu-north1"
  }
}

​

Fields

• .id* The event identifier.
• .source* The name of the event source; that is, the gRPC API method of Nebius AI Cloud that the subject used to perform the action, for example, nebius.iam.v1.ServiceAccountService/List.
• .specversion* The version of the CloudEvents specification that the event uses. For more details, see specversion in the list of CloudEvents context attributes.
• .type* The event type. All types contain the ai.nebius prefix and reference Nebius AI Cloud services, types of resources in them and actions performed on these resources. For example, ai.nebius.iam.service_account.list.
• .service.name The name of the service where the event occurred. For the list of services and their .service.name values, see Nebius AI Cloud services supported by Audit Logs.
• .action The action type: CREATE, UPDATE, DELETE, etc.
• .time The timestamp of the event in the RFC 3339 format. For example, 2025-03-25T17:29:22.024775156Z.
• .event_version The version of Audit Logs event specification that the event uses. Format: <major>.<minor>; for example, 1.04. Specifications with the same major version and different minor versions are backwards-compatible, but specifications with different major versions are not.
• .authentication The details about the subject that performed the action and how Nebius AI Cloud authenticated it:
  • .authentication.authenticated A Boolean that shows whether the authentication was successful.
  • .authentication.subject The details about the subject (the user account or the service account):
    • .authentication.subject.name The name of a service account or the email of a user account. If the service account name is Nebius, the event was triggered by Nebius as part of maintenance or a support investigation.
    • .authentication.subject.tenant_user_id The user account ID, with the tenantuseraccount- prefix.
    • .authentication.subject.service_account_id The service account ID, with the serviceaccount- prefix. For the Nebius service account, only the name is shown.
    Only .authentication.subject.tenant_user_id or .authentication.subject.service_account_id is included, depending on the type of the subject account.
  • .authentication.federation The details about the Nebius AI Cloud federation that the subject user account authenticated with:
    • .authentication.federation.id The federation ID, with the federation- prefix.
    • .authentication.federation.name The federation name.
  • .authentication.authentication_type The type of the credentials that the subject authenticated with: ACCESS_TOKEN for access tokens or STATIC_KEY for AWS-compatible access keys.
  • .authentication.token_credential.masked_token The access token without the signature.
  • .authentication.static_key.id The access key ID.
  Only .authentication.token_credential or .authentication.static_key is included, depending on the type of the credentials.
• .authorization.authorized A Boolean that shows whether Nebius AI Cloud successfully authorized the subject to perform the action.
• .resource The details about the resource on which the action was performed:
  • .resource.metadata The resource metadata:
    • .resource.metadata.id The ID of the resource.
    • .resource.metadata.name The name of the resource.
    • .resource.metadata.type The resource type. For example, vpcallocation.
  • .resource.hierarchy The list of the resource’s ancestors, from tenant to parent. For example, ancestors of a Managed Service for PostgreSQL® cluster are the tenant and a project in the tenant. Each element of the list has the same fields as .resource.metadata: .id, .name and .type.
  • .resource.state.previous The state of the resource before the UPDATE or DELETE action. The state may contain, for example, the resource’s metadata (.metadata), specification (.spec) and status (.status).
  • .resource.state.current The state of the resource after the CREATE or UPDATE action. For more information about states, see the description of .resource.state.previous.
• .request The metadata of the request from the subject to Nebius AI Cloud:
  • .request.request_id The request UUID. Each request, including requests that retry the same action, has a unique ID.
  • .request.parameters Parameters provided in the API call that triggered the action.
  • .request.idempotency_id The idempotency UUID of the request. When two requests are retries of the same action, they have the same idempotency ID.
  • .request.trace_id The trace-id of the request. It is used to identify the distributed trace of the event: a set of calls that were made between Nebius AI Cloud systems and components when the subject requested to perform the action.
• .response The status of the response from Nebius AI Cloud to the subject:
  • .response.status_code The gRPC status code returned in the response.
  • .response.error_message The error message. If .response.status_code is OK, the message is empty.
  • response.payload Data returned by the system in response to the API call.
• .status The status of the Nebius AI Cloud operation associated with the event: STARTED, DONE or ERROR.
• .project_region.name The Nebius AI Cloud region of the resource’s parent project.