This is the bass part on acoustic guitar, it should be about the same on a bass guitar as well.
[ Tab from: http://www.guitaretab.com/r/rac/385799.html ]
e|-------------------------------------------------|
B|-------------------------------------------------|
G|-------------------------------------------------|
D|-------------------------------------------------|
A|-------------------------------------------------|
E|-6-6-5-1--6-6-5-1--6-6-5-1--6-6-5-1-1-1-1--------|
It's literally just this the entire song, so enjoy-
Mitchell