Success Case Request:
POST https://sandbox.silamoney.com/0.2/check_handle
HTTP/1.1
authsignature: 14d202d417aed249d693e5f3abc024d4c205b8fc3ba4067d83735ab19bd552852d6c42c4e0454835c3b31853451042bed81127fb71350a2542832601ea50caa71b
Content-Type: application/json
{
	"message":"header_msg",
	"header":
		{
			"auth_handle":"rally.silamoney.eth",
			"created":1574088699,
			"crypto":"ETH",
			"reference":"939770",
			"user_handle":"knabuser1.silamoney.eth",
			"version":"0.2"
		}
}

Success Case Response:

{
	"message":"knabuser1 is available!",
	"reference":"939770",
	"status":"SUCCESS"
}

Failure Case Request:

POST https://sandbox.silamoney.com/0.2/check_handle
HTTP/1.1
authsignature: 1fa690290908c2b9fdc8b02f651fc3d088685693cb8bee20f575451c9e55af0532579606faf6991ad02d14e37b0ee2ad9b0cb25de505953ebc8b0d2ec6bc7e851b
Content-Type: application/json
{
	"message":"header_msg",
	"header":
		{
			"auth_handle":"rally.silamoney.eth",
			"created":1574088821,
			"crypto":"ETH",
			"reference":"264567",
			"user_handle":"knabuser1.silamoney.eth",
			"version":"0.2"
		}
}

Failure Case Response:

{
	"reference":"264567",
	"message":"Failed to authenticate app signature. The derived address 0x004d7a848D5f5dC40bbe902d7b078EF71e724b9E is not registered to rally.",
	"status":"FAILURE"
}