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":"b70fc17485c95878860d255f2b368fbd20376cbf2bbedc03b634ac6254158241","actionTitle":"FIFA 2026 ticket purchase · USA vs Brazil · Cat 1 · Verified Fan","actionType":"ticket_purchase","actorHandle":"demo","externalReference":null,"organizationSlug":null,"signatureSlug":"mnav_sig_c_HgnK0YKAkI","signedAt":"2026-06-08 05:59:35"}
Action payload hash · SHA-256 of the canonical action payload
b70fc17485c95878860d255f2b368fbd20376cbf2bbedc03b634ac6254158241
Server signature · HMAC-SHA256 over canonical JSON above
811a3f41bdfb8e847ce10e2757287ce06ef5122a1315390ea854f9444fab31b7
Recompute it yourself
$ printf '%s' '{"actionPayloadHash":"b70fc17485c95878860d255f2b368fbd20376cbf2bbedc03b634ac6254158241","actionTitle":"FIFA 2026 ticket purchase · USA vs Brazil · Cat 1 · Verified Fan","actionType":"ticket_purchase","actorHandle":"demo","externalReference":null,"organizationSlug":null,"signatureSlug":"mnav_sig_c_HgnK0YKAkI","signedAt":"2026-06-08 05:59:35"}' \
| openssl dgst -sha256 -hmac "$MANAV_SERVER_SIGNING_SECRET" -hex
$ # expected: 811a3f41bdfb8e847ce10e2757287ce06ef5122a1315390ea854f9444fab31b7