is this webhook parsing example still valid? I'm getting neynar errors and I don't see it in the latest mini app examples. 

https://github.com/farcasterxyz/frames-v2-demo/blob/0beedbc9ac2fb42816bb7969e31662e3555b1615/src/app/api/webhook/route.ts

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"message": "Expected string, received array"
      }
    ]
      
        at async rb (.next/server/app/api/webhook/route.js:3:5149)
        at async rx (.next/server/app/api/webhook/route.js:3:5958) {
      issues: [
        [Object], [Object], [Object], [Object],
        [Object], [Object], [Object], [Object],
        [Object], [Object], [Object], [Object],
        [Object], [Object], [Object], [Object],
        [Object], [Object], [Object], [Object],
        [Object], [Object], [Object], [Object],
        [Object], [Object], [Object], [Object],
        [Object], [Object], [Object], [Object],
        [Object], [Object], [Object], [Object],
        [Object], [Object], [Object], [Object],
        [Object], [Object]
      ],
      addIssue: [Function (anonymous)],
      addIssues: [Function (anonymous)]
    }
  }
}
VerifyAppKeyError: VerifyJsonFarcasterSignature.VerifyAppKeyError Error verifying app key