Proof that the customer holds the private key. Required for every key, unlike the single key endpoint: bulk registration has no interactive step in which a proof can arrive later.
| Name | Type | Description | Notes |
|---|---|---|---|
| message | String | The message to be signed by the key as proof of ownership. 64 to 1024 bytes in hexadecimal format. | |
| signature | String | The signature of the message. 64 bytes in hexadecimal format. |