private/export/model/RoleManagementPolicyAssignment-model.json

{
    "@odata.context": "https://graph.microsoft.com/beta/$metadata#policies/roleManagementPolicyAssignments",
    "value": [
        {
            "scopeType": null,
            "scopeId": null,
            "id": null,
            "policyId": null,
            "roleDefinitionId": null
        }
    ]
}