curl --request POST \
  --url https://api.sandbox.monite.com/v1/receivables/{receivable_id}/accept \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'x-monite-entity-id: <x-monite-entity-id>' \
  --header 'x-monite-version: <x-monite-version>' \
  --data '
{
  "signature": {
    "email": "jsmith@example.com",
    "full_name": "<string>",
    "signature_image": "<string>"
  }
}
'

{
  "success": true
}