To decode a set of bytes, you need to imagine what is encoded there and how to decrypt it (decryption scheme)
It is impossible to decode arbitrary data without knowing what it is and how to work with it.

i got from fragment.
full data
{"version":"0","body":{"type":"sign-raw-payload","params":{"source":"EQCA14o1-VWhS2efqoh_9M1b_A9DtKTuoqfmkn83AbJzwnPi","valid_until":1669875028,"messages":[{"address":"EQCA14o1-VWhS2efqoh_9M1b_A9DtKTuoqfmkn83AbJzwnPi","amount":10000000000000,"payload":"te6ccgEBBAEA5wADrUY3KJo-0Uu8LR7qtft8VK7UXunmrlII6Ylxix7SwKdatsZkUNLLXj4J3HwXpfGatI1RncyKUH3OoaOJyo0AygCInYIBAAAAA2OIRApjiESgBXBlbmlzwAECAwBaAWh0dHBzOi8vbmZ0LmZyYWdtZW50LmNvbS91c2VybmFtZS9wZW5pcy5qc29uAGOAGAUX7Ahh6mJrsavv5apyYYQi3sKCw7dHkQ_0DXCZchhsEjCc5UAAAKAAAcIAASdQEABLAAUAZIAIEbR2UW2Ay0snwgciTTdVU4vxldeBjTs-FVd1ZVMkrXA"}]},"response_options":{"callback_url":"https:\/\/fragment.com\/tonkeeper\/rawResponse?id=YyL-8F_8nhGb6yvqY8v2dMa3&qr=1","return_url":"https:\/\/fragment.com\/tonkeeper\/rawResponse?id=YyL-8F_8nhGb6yvqY8v2dMa3","broadcast":true},"expires_sec":1669875028}}

no one is here can help? 🥹

the scheme of your tx data is:
OP(32 bits)
Signature(512 bits)
subwallet Id ( 32 bits)
valid_since( 32 bit)
valid_till ( 32 bit)
username length(8 bit)
username(8bit * length)
content(ref)
auction config(ref)
royalty(ref)