There was an announcement from NASA
What is Consuming Hydrogen and Acetylene on Titan?
Two new papers based on data from NASA’s Cassini spacecraft scrutinize the complex chemical activity on the surface of Saturn’s moon Titan. While non-biological chemistry offers one possible explanation, some scientists believe these chemical signatures bolster the argument for a primitive, exotic form of life or precursor to life on Titan’s surface. According to one theory put forth by astrobiologists, the signatures fulfill two important conditions necessary for a hypothesized “methane-based life.”
After some search, I have found a couple of papers
C.P. McKay, H.D. Smith, Possibilities for methanogenic life in liquid methane on the surface of Titan, Icarus, Volume 178, Issue 1, 1 November 2005, Pages 274-276
Francois Raulin, Astrobiology and habitability of Titan, Space Science Reviews, Volume 135, Numbers 1-4, 37-48, 2008
where there is an overview of ideas behind it. Well, NASA must fight for money, without funding science is impossible.