examples/cc/helloworld/aes128_gcm_test_keyset_json.txt

{
    "primaryKeyId": 515279322,
    "key": [{
        "keyData": {
            "typeUrl": "type.googleapis.com/google.crypto.tink.AesGcmKey",
            "keyMaterialType": "SYMMETRIC",
            "value": "GhCS/1+ejWpx68NfGt6ziYHd"
        },
        "outputPrefixType": "TINK",
        "keyId": 515279322,
        "status": "ENABLED"
    }]
}