Structure Operation outcome

In this example, operation outcome resource is having an structural error during the validation operation.

{
"resourceType": "OperationOutcome",
"id": "4e605a23-951c-42fb-b828-89f11686a993",
"issue": [
{
"severity": "error",
"code": "structure",
"diagnostics": "<A structural issue in the content such as wrong namespace, or unable to parse the content completely, or invalid json syntax>"
}
]
}