{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "wallet_watchAsset",
  "params": {
    "type": "ERC20",
    "options": {
      "address": "0xA0b86a33E6776e1e627E5C82dF4C0cf77B8bb0c9",
      "symbol": "USDC",
      "decimals": 6,
      "image": "https://cryptologos.cc/logos/usd-coin-usdc-logo.png"
    }
  }
}

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "wallet_watchAsset",
  "params": {
    "type": "ERC20",
    "options": {
      "address": "0x6b175474e89094c44da98b954eedeac495271d0f",
      "symbol": "DAI",
      "decimals": 18
    }
  }
}

{
  "id": 1,
  "jsonrpc": "2.0",
  "result": true
}

{
  "id": 1,
  "jsonrpc": "2.0",
  "error": {
    "code": 4001,
    "message": "User rejected the request"
  }
}