Request body sample: {"jsonrpc":"2.0","method":"eth_sign","params":["0x9b2055d370f73ec7d8a03e965129118dc8f5bf83", "0xdeadbeaf"],"id":1}
OK
const response = await fetch('eth_sign', { method: 'POST', headers: { "Content-Type": "application/json" }, body: JSON.stringify({}), }); const data = await response.json();
{ "id": 0, "jsonrpc": "text", "result": "text" }