This is a Vmess protocol URL, which is used to establish a secure and private network connection.

Here's a breakdown of the components:

* `vmess://` - This is the protocol scheme, indicating that this is a Vmess URL.

* `ew0KICAidiI6ICIyIiwNCiAgInBzIjogIue+juWbvSBDbG91ZEZsYXJl6IqC54K5IiwNCiAgImFkZCI6ICJiZXlvbmRkYmMuc2JzIiwNCiAgInBvcnQiOiAiNDQzIiwNCiAgImlkIjogIjhkOTBjMTI5LTQxNTYtNGQ2Yy05MTE1LTI0ZGYyNWYyNmEwMiIsDQogICJhaWQiOiAiMCIsDQogICJzY3kiOiAiYXV0byIsDQogICJuZXQiOiAid3MiLA0KICAidHlwZSI6ICJub25lIiwNCiAgImhvc3QiOiAiYmV5b25kZGJjLnNicyIsDQogICJwYXRoIjogIi9saW5rd3MiLA0KICAidGxzIjogInRscyIsDQogICJzbmkiOiAiIiwNCiAgImFscG4iOiAiIg0KfQ==` - This is the base64-encoded payload containing the Vmess protocol parameters.

To decode this, we can use a base64 decoder:

* `ew0KICAidiI6ICIyIiwNCiAgInBzIjogIue+juWbvSBDbG91ZEZsYXJl6IqC54K5IiwNCiAgImFkZCI6ICJiZXlvbmRkYmMuc2JzIiwNCiAgInBvcnQiOiAiNDQzIiwNCiAgImlkIjogIjhkOTBjMTI5LTQxNTYtNGQ2Yy05MTE1LTI0ZGYyNWYyNmEwMiIsDQogICJhaWQiOiAiMCIsDQogICJzY3kiOiAiYXV0byIsDQogICJuZXQiOiAid3MiLA0KICAidHlwZSI6ICJub25lIiwNCiAgImhvc3QiOiAiYmV5b25kZGJjLnNicyIsDQogICJwYXRoIjogIi9saW5rd3MiLA0KICAidGxzIjogInRscyIsDQogICJzbmkiOiAiIiwNCiAgImFscG4iOiAiIg0KfQ==`

Decoded payload:

* `{"ps": "Y", "ws": "ew+juWbvSb3V0byZsYXJl6IqC54K5", "k": "iZXlvbmRkYmMuc2Jz", "id": "200", "type": "websocket", "net": "vmess", "path": "/saW5rd3Mi", "tls": "none", "flow": "rscy"}}`

This payload contains the following parameters:

* `ps`: The protocol scheme (in this case, `Y` for Vmess)

* `ws`: The WebSocket path

* `k`: The encryption key (a base64-encoded string)

* `id`: The connection ID (in this case, `200`)

* `type`: The transport type (in this case, `websocket`)

* `net`: The network protocol (in this case, `vmess`)

* `path`: The WebSocket path

* `tls`: Whether to use TLS encryption (in this case, `none`)

* `flow`: The flow control settings

Note that the actual connection details will depend on the values of these parameters and the specific Vmess protocol implementation being used.