Method eth_getFilterChanges undefined ()
connect with WS protocol

Parameters

QUANTITY - string

The filter id.

Request

wscat -c wss://matic.getblock.io/YOUR-API-KEY/mainnet/ 
# wait for connection and send the request body 
{"jsonrpc": "2.0",
"method": "eth_getFilterChanges",
"params": ["0x16"],
"id": "getblock.io"}

Response

{
    "error": {
        "code": -32000,
        "message": "filter not found"
    },
    "id": "getblock.io",
    "jsonrpc": "2.0"
}