This could work?
```json
{
"kind": 900,
"created_at": "[Creation Timestamp]",
"content": "[Content in Markdown]",
"tags": [
["title", "<Contract Title>"],
["summary", "<Short Description>"], // Optional: Short Description for preview
["valid_from", "Timestamp"], // Optional: Start date of the contract
["valid_to", "Timestamp"], // Optional: End date of the contract
["L", "nostr_contracts"],
["l", "Contract", "nostr_contracts"], // One could use "Covenant", "Agreement", or another type according to your specifications.
["p", "party", "<party's 1 pubkey>"],
["p", "party", "<party's 2 pubkey>"],
["p", "party", "<party's 3 pubkey>"],
["expiration", "<Time stamp limit to sign>"],
["jurisdiction", {
"country": "USA",
"state": "California",
"city": "San Francisco",
"court": "Superior Court of California"
}]
],
"pubkey": "[Signer's Public Key]",
"id": "[Event ID]",
}
```
