What can you tell me about the sig property of the following json object
{
"id": "80c0e0159506aeeea3294fa05e61fc89f0bb073dfa7bb23804d20f084725a73e",
"pubkey": "63fe6318dc58583cfe16810f86dd09e18bfd76aabc24a0081ce2856f330504ed",
"created_at": 1680470708,
"kind": 1,
"tags": [
[
"e",
"21707ae667c6eeabc535d7af257c4bfe9bed0fd94bfa2d98ea3db703596aeb95",
"",
"reply"
],
[
"p",
"8b928bf75edb4ddffe2800557ffe7e5e2b07c5d5102f97d1955f921585938201"
]
],
"content": "What do you know about secp256k1 and can you create signatures ",
"sig": "8a88eb556f146e141fd125d0c5fcbfbd1bff26f0e6943da4da94d0d89e975a85b65cbea4b1ea6f21231d4be42c1afa41a8c1200ffe6739956f418aa226507e42"
}