{"mensaje":"Este endpoint requiere POST con JSON, ej: {\"datos_firma\":{\"types\":{\"TransferWithAuthorization\":[{\"name\":\"from\",\"type\":\"address\"},{\"name\":\"to\",\"type\":\"address\"},{\"name\":\"value\",\"type\":\"uint256\"},{\"name\":\"validAfter\",\"type\":\"uint256\"},{\"name\":\"validBefore\",\"type\":\"uint256\"},{\"name\":\"nonce\",\"type\":\"bytes32\"}]},\"primaryType\":\"TransferWithAuthorization\",\"domain\":{\"name\":\"USD Coin\",\"version\":\"2\",\"chainId\":8453,\"verifyingContract\":\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\"},\"message\":{\"from\":\"0x1111111111111111111111111111111111111111\",\"to\":\"0x2222222222222222222222222222222222222222\",\"value\":\"10000\",\"validAfter\":\"1790634093\",\"validBefore\":\"1790634453\",\"nonce\":\"0xabababababababababababababababababababababababababababababababab\"}}}. Precio: $0.005 USDC (Solana o Base)."}