The hybridization and magnetic nature of ${\left[Mn{\left(CN\right)}_6\right]}^{4-}$ and ${\left[Fe{\left(CN\right)}_6\right]}^{3-}$ , respectively are 

${\left[Mn{\left(CN\right)}_6\right]}^{4-}$  and  ${\left[Fe{\left(CN\right)}_6\right]}^{3-}$
  $M{n}^{2+}$                     $F{e}^{3+}$
   $\left[Ar\right]3d^{5}4s^o$         $\left[Ar\right]3d^{5}4s^o$ 
Since,$C{N}^{\Theta }$ is a strong field ligand and pairing will start and it will lead to formation of inner orbital complex 
Both will show same configuration

$d^{2}s{p}^3$-hybridisation.
Due to unpaired electron it will be paramagnetic