The method eth_signTypedData does not exist/is not available

Seems there is some problems related to eth_signTypedData method.

There is what i wanna to do:

curl -X POST --data '{
	"id": 1337,
	"jsonrpc": "2.0",
	"method": "eth_signTypedData",
	"params": ["0xCD2a3d9F938E13CD947Ec05AbC7FE734Df8DD826", {
		"types": {
			"EIP712Domain": [{
				"name": "name",
				"type": "string"
			}, {
				"name": "version",
				"type": "string"
			}, {
				"name": "chainId",
				"type": "uint256"
			}, {
				"name": "verifyingContract",
				"type": "address"
			}],
			"Person": [{
				"name": "name",
				"type": "string"
			}, {
				"name": "wallet",
				"type": "address"
			}],
			"Mail": [{
				"name": "from",
				"type": "Person"
			}, {
				"name": "to",
				"type": "Person"
			}, {
				"name": "contents",
				"type": "string"
			}]
		},
		"primaryType": "Mail",
		"domain": {
			"name": "Ether Mail",
			"version": "1",
			"chainId": 1,
			"verifyingContract": "0xCcCCccccCCCCcCCCCCCcCcCccCcCCCcCcccccccC"
		},
		"message": {
			"from": {
				"name": "Cow",
				"wallet": "0xCD2a3d9F938E13CD947Ec05AbC7FE734Df8DD826"
			},
			"to": {
				"name": "Bob",
				"wallet": "0xbBbBBBBbbBBBbbbBbbBbbbbBBbBbbbbBbBbbBBbB"
			},
			"contents": "Hello, Bob!"
		}
	}]
}' https://mainnet.infura.io/v3/<project_id>

And seems method not working right now.
It just returns:

{"jsonrpc":"2.0","id":1337,"error":{"code":-32601,"message":"The method eth_signTypedData does not exist/is not available"}}

Hi @m1ome, and welcome to the Infura community! We don’t actually support that method, but MetaMask does - you can check out their documentation here!

Can you correct me AFAIK Metamask uses INFURA as a rpc provider.
Then how it can be possible that INFURA nodes don’t support that method, but metamask using INFURA does?