The word "easy" shows up in many expressions

Go easy on the salt. (Don't use too much.)

They're living on easy street. (They're rich)

Take it easy(Goodbye)

She's easy on the eyes (She beautiful)
In AmE, 'take it easy' is a casual parting expression, which I suppose is what Raj means, Rover.
Have you a question?

'Take it easy' does not mean 'goodbye'. It means 'Have a rest'/'don't work so hard.'