curl --request PATCH \
  --url https://app.sajn.se/api/v1/documents/{id}/signers/{signerId} \
  --header 'Content-Type: application/json' \
  --header 'authorization: <authorization>' \
  --data '{
  "name": "<string>",
  "email": "jsmith@example.com",
  "phone": "<string>",
  "companyName": "<string>",
  "companyRole": "<string>",
  "companyOrgNumber": "<string>",
  "externalId": "<string>",
  "companyId": "<string>",
  "ssn": "<string>",
  "role": "SIGNER",
  "signingOrder": 123
}'

{
  "id": "<string>",
  "documentId": "<string>",
  "email": "jsmith@example.com",
  "name": "<string>",
  "phone": "<string>",
  "companyName": "<string>",
  "companyRole": "<string>",
  "companyOrgNumber": "<string>",
  "externalId": "<string>",
  "companyId": "<string>",
  "ssn": "<string>",
  "role": "SIGNER",
  "signingOrder": 123,
  "token": "<string>",
  "signedAt": "<any>",
  "readStatus": "NOT_OPENED",
  "signingStatus": "NOT_SIGNED",
  "signingUrl": "<string>"
}