Event JSON
{
"id": "b48453abf9a541c90416de215de705fa0a0c250aa5ac8ebfb96e31aeeca76c7c",
"pubkey": "d51aed007730b937c47bdaeb6898399f6afdab50d28bb532c1c0fa9624a624d0",
"created_at": 1675412796,
"kind": 1,
"tags": [],
"content": "hello，world！",
"sig": "e65c067843c1f279ef28525b1b320938b2642a8609603feed0a46d539bc752429b933be35f1951abb790bcbf9e376c9567c81ab2e78cb92331bce31407c5d139"
}