{
 "wrong_token": {
  "status": 401,
  "body": "{\"error\":\"Unauthorized: Invalid token\"}"
 },
 "valid_token_empty_body": {
  "status": 400,
  "body": "{\"error\":\"Missing required fields: from, to, subject, message\",\"received_data\":{\"from\":\"missing\",\"to\":\"missing\",\"subject\":\"missing\",\"message\":\"missing\"}}"
 }
}