function readData() {
  var coordinates = [1, 1, 1, 26];
  reset();
  var range = read(coordinates);
  storeData(range);
  logProperties();
}

function read(coordinates) {
  Logger.log(coordinates.toString());
  var spreadSheet = SpreadsheetApp.openById("1L3Sd-J780mQtb7JYsmJzInI1kMdrQA8GbLspQJ5eVW4");
  var sheet = spreadSheet.getSheetByName("tracker");
  var range = sheet.getRange(coordinates[0], coordinates[1], coordinates[2], coordinates[3]).getValues();
  return JSON.stringify(range);
}

function logProperties() {
  var keys = PropertiesService.getScriptProperties().getKeys();
  Logger.log(keys);
}

function reset() {
  PropertiesService.getScriptProperties().deleteAllProperties();}

function storeData(range) {
  Logger.log(range);
}




Execution log
1:48:00 AM	Notice	Execution started
1:48:01 AM	Info	1,1,1,26
1:48:01 AM	Info	[["one","two","three","four","five","","","","","","","","","","","","","","","","","","","","",""]]
1:48:01 AM	Info	[]
1:48:01 AM	Notice	Execution completed