Convex

{
  "type": "object",
  "required": ["value",
               "seed"],
  "properties": {
                  "seed": {
                            "type": "string",
                            "description": "Ed25519 seed as 64 hex characters"
                          },
                  "value": {
                             "type": "string",
                             "description": "Hex encoded bytes to sign. For Convex transactions, this is the 'hash' field returned by prepare i.e. the ref-encoding of the transaction."
                           }
                }
}

{
  "type": "object",
  "properties": {
                  "signature": {
                                 "type": "string",
                                 "description": "Hex encoded Ed25519 signature"
                               },
                  "value": {
                             "type": "string",
                             "description": "Hex encoded payload that was signed"
                           },
                  "accountKey": {
                                  "type": "string",
                                  "description": "Hex encoded public key"
                                }
                }
}