Sign proof of wallet ownership message

Submit the signature of the message provided in the order details.

The body of the request must contain the signature of the message. The message to sign is located in the body property of the message_to_sign object of the order details.

Once the signature is verified to be correct (204 response), the order becomes executable and the order details will contain the payment_details object which provides the information to use to pay the order.

Do not build the URL of this endpoint but instead use the value of signature_submission_url included along the message to be signed in the order details.