Error Handling

{
  "jsonrpc": "2.0",
  "result": "3TEjEHSHPfNp5frqxVW...",
  "id": 1
}

{
  "jsonrpc": "2.0",
  "error":  { "code": -32602, message: "Invalid API Key. ", data: null },
  "id": 1
}

{
  "jsonrpc": "2.0",
  "error":  { "code": -32601, message: "Method no found.", data: null },
  "id": 1
}