Recovering data from mystery signal
Does this get you anywhere? Apologies for my lacking coding vocabulary, feel free to edit.

Figure 1. Adobe Audition spectrogram of the lowest band of 06-Sep-2018 18h48m47s - 460.519.5 MHz, NFM.wav using Kaiser (180dB) window, 2048 bands, 100 % window width, 80 dB range. A manually adjusted grid is superimposed over the spectrogram.

It's repeating a 16-bit pattern ???? ???? ?111 1110 (spaces added for readability). That would be 9 data bits, and a synchronization sequence of 6 up bits and 1 down bit. The data bits should not contain the string 1111110 or else synchronization may fail. You can synchronize the bit clock to the first up→down transition after a long enough run of the up frequency.