curl --request POST \
  --url https://{host}/extern/fe/intent/{intentId}/lock \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'X-Publishable-Key: <api-key>' \
  --data '
{
  "signerAddress": "<string>"
}
'

{
  "status": "<string>",
  "data": {
    "intentId": "<string>",
    "expiresAt": "2023-11-07T05:31:56Z",
    "createdAt": "2023-11-07T05:31:56Z",
    "externalRef": "<string>",
    "requestParams": "<unknown>",
    "quoteSummary": "<unknown>",
    "lockedAt": "2023-11-07T05:31:56Z",
    "lockedBy": "<string>",
    "txHashes": [
      "<string>"
    ],
    "chainIds": [
      123
    ],
    "settledAt": "2023-11-07T05:31:56Z",
    "errorMessage": "<string>",
    "payload": "<unknown>"
  }
}