It's the same all the song
This is the Raine's style to play this song in acoustic...

It's the standard tunning without capo played version :D
You must strum down fast all time

C[332010]
G[320033]
Am[002210]
F[133211]

C                                         G
You looked at me as you walked into the room
                  Am
like the red sea you split me open
                  F
somehow I knew these wings were stolen
G
all you did was save my life
    C                           G
I tried to run but I couldn't move
                                 Am
Well I paid for these concrete shoes
                              F   
but like a singer that sings the blues
     G                            F
you saw hope in the hopeless
Chrous:
G
I'm not dying
C                     G     
all you did was save my life
                        Am    
pulled me out of that flat line
                          F
put the heartbeat back inside
G
I'm not dying
C                   G
all you did was get me through
                      Am
I owe every breath to you
                F
heart and soul unparalyzed
G
all you did was save my life


Save my life...

I'm not for sale but I've been sold
the more I hear the less I know
and the lies are swallowed whole            (And this is the Verse 1)
and their insignificance                     
The story's been told a million times
but it's different when it's your life
I won a lottery tonight
the lottery tonight

Chorus

Am                   F
I started to come around
                      C
the dogs are backing down
               G
I'm not afraid to see
Am                       F
The devils gone underground
                       C
this tightrope's been cut down
               G
and I can finally breathe

You looked at me as you walked in the room   (Slowly the first and second)
like the red sea you split me open
somehow I knew this wings were stolen...

Chorus

All you did was save my life
(Put the heartbeat back inside)
All you did was save my life
(Put the heartbeat back inside)
All you did was save my life...


And that's all :D
I hope it can be useful for you
enjoy!