{
  "bsonType": "object",
  "properties": {
    "encrypted": {
      "encrypt": {
        "keyId": [
          {
            "$binary": {
              "base64": "LOCALAAAAAAAAAAAAAAAAA==",
              "subType": "04"
            }
          }
        ],
        "bsonType": "string",
        "algorithm": "AEAD_AES_256_CBC_HMAC_SHA_512-Deterministic"
      }
    }
  }
}