curl --request PUT \
  --url "https://directory.example.com/delivery-policies/recipients/did%3Atalaria%3A1111111111111111111111" \
  --header "Content-Type: application/json" \
  --data '{
  "did": "did:talaria:1111111111111111111111",
  "policy": {
    "release_pricing": {
      "asset": "TAL",
      "amount": "100"
    },
    "expiration_behavior": {
      "mode": "retain",
      "retain_until": "1784236800000"
    },
    "allowed_relays": [
      "did:talaria:relay-example"
    ]
  }
}'

{
  "status": "accepted",
  "did": "did:talaria:1111111111111111111111",
  "extrinsic": "set_delivery_policy",
  "tx_hash": "<transaction-hash>",
  "message": "Chain extrinsic submitted"
}