cc/examples/aead/aead_test_keyset.json

{
  "key": [
    {
      "keyData": {
        "keyMaterialType": "SYMMETRIC",
        "typeUrl": "type.googleapis.com/google.crypto.tink.AesGcmKey",
        "value": "GiBWyUfGgYk3RTRhj/LIUzSudIWlyjCftCOypTr0jCNSLg=="
      },
      "keyId": 294406504,
      "outputPrefixType": "TINK",
      "status": "ENABLED"
    }
  ],
  "primaryKeyId": 294406504
}