Manav signed the canonical JSON below with its server secret. Hash the JSON with HMAC-SHA256 using the MANAV_SERVER_SIGNING_SECRET and compare - if it matches, this proof is authentic.
Canonical proof JSON
{"actionPayloadHash":"7ae4562d842eb1394f689d8054da460240c4b22273b2a7b7e20d46b721c2202c","actionTitle":"MSA: Acme AI Labs ↔ GreenLeaf Designs LLC","actionType":"contract_sign","actorHandle":"arivu13_f2d1e0","externalReference":null,"organizationSlug":null,"signatureSlug":"mnav_sig__U2nN4YTHnPt","signedAt":"2026-06-02 08:28:14"}
Action payload hash · SHA-256 of the canonical action payload
7ae4562d842eb1394f689d8054da460240c4b22273b2a7b7e20d46b721c2202c
Server signature · HMAC-SHA256 over canonical JSON above
35649d86ec472ceabaa4b39b9680bb9a0203e8bb9608b38a75573439cfbfbd11
Recompute it yourself
$ printf '%s' '{"actionPayloadHash":"7ae4562d842eb1394f689d8054da460240c4b22273b2a7b7e20d46b721c2202c","actionTitle":"MSA: Acme AI Labs ↔ GreenLeaf Designs LLC","actionType":"contract_sign","actorHandle":"arivu13_f2d1e0","externalReference":null,"organizationSlug":null,"signatureSlug":"mnav_sig__U2nN4YTHnPt","signedAt":"2026-06-02 08:28:14"}' \
| openssl dgst -sha256 -hmac "$MANAV_SERVER_SIGNING_SECRET" -hex
$ # expected: 35649d86ec472ceabaa4b39b9680bb9a0203e8bb9608b38a75573439cfbfbd11