Constructs a new SaveMessageActivityMutation instance.
The authentication token.
saveMessageActivity is a method that sends a mutation request to save a message activity.
An object of type SaveMessageActivityVariables representing the variables for the mutation.
A Promise that resolves to the response from the mutation request.
Will throw an error if the mutation request fails or if the provided variables do not pass the validation checks.
SaveMessageActivityMutationis a class representing a mutation to save a message activity. It includes a method to save a message activity