Some signal at 157 MHz

Hello!I'm new to using RTL SDR and I am very interested in reverse engineering unknown signals. I recently came across a signal that I was unable to identify using the Signal Identification Wiki, and I thought it might be a good place to start. However, I am not sure where to begin. The signal appears to be digital in nature. Could you recommend any software or resources for me to look into as I start my investigation? You can listen to the signal here http://sndup.net/zk42

https://preview.redd.it/f3tp3rckf2aa1.png?width=295&format=png&auto=webp&v=enabled&s=8c29e3d2d84d9ccd0289f0f3bcefe14f930b3db5