Finding, replacing, deleting and adding to a nested collection

Problem: I have an object that has a field call modules that is and array of activities. Activities is itself a complex and many nested object. I need to hunt for activities by their IDs and replace, delete or insert between existing objects

// Replace object in collection
Object.keys(data.modules).forEach(modKey => {
  Object.keys(data.modules[modKey].activities).forEach(activityKey => {
    if (data.modules[modKey].activities[activityKey].id === newActivity.id) {
      data.modules[modKey].activities.splice(activityKey, 1, newActivity);
    }
  });
});

// Remove object in collection
Object.keys(data.modules).forEach(modKey => {
  Object.keys(data.modules[modKey].activities).forEach(activityKey => {
    if (
      data.modules[modKey].activities[activityKey] &&
      data.modules[modKey].activities[activityKey].id === newActivity.id
    ) {
      data.modules[modKey].activities.splice(activityKey, 1);
    }
  });
});

// Insert object at index
const moudleIndex = 0;
const activityIndex = 2;

Object.keys(data.modules).forEach(modKey => {
  if (modKey == moudleIndex) {
    Object.keys(data.modules[modKey].activities).forEach(activityKey => {
      if (activityKey == activityIndex) {
        data.modules[modKey].activities.splice(activityKey, 0, newActivity);
      }
    });
  }
});