curl --request PATCH \
  --url https://api.privy.io/v1/policies/{policy_id} \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --header 'privy-app-id: <privy-app-id>' \
  --data '
{
  "name": "<string>",
  "rules": [
    {
      "name": "<string>",
      "conditions": [
        {
          "value": "<string>"
        }
      ]
    }
  ],
  "owner": {
    "user_id": "<string>"
  },
  "owner_id": "<string>"
}
'

{
  "id": "tb54eps4z44ed0jepousxi4n",
  "name": "Allowlisted stablecoins",
  "chain_type": "ethereum",
  "rules": [
    {
      "id": "bdyfoa65pro1eez6iwtzanol",
      "name": "Allowlist USDC contract on Base",
      "method": "eth_sendTransaction",
      "conditions": [
        {
          "field_source": "ethereum_transaction",
          "field": "to",
          "operator": "eq",
          "value": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
        }
      ],
      "action": "ALLOW"
    }
  ],
  "owner_id": null,
  "version": "1.0",
  "created_at": 1741833088894
}