Use this endpoint to update a legal client’s payment‑account information:

• Your client submits their updated details on your platform.
• Your server invokes the Lemonway Webservice with the new data.
• Lemonway applies any changes for fields that already exist.
• Your application parses Lemonway’s response.
• Your system displays a confirmation message to the client.

Important: Whenever you see accountId in a path or body parameter, enter your wallet’s ID.