After discussions with Japanese investor SoftBank fell through, Bengaluru-based smart wearables maker Ultrahuman is now in advanced talks with WestBridge Capital to raise $100-120 million in fresh funding, people aware of the matter told ET. The potential deal with WestBridge could value Ultrahuman at around $500-550 million, they said.Earlier, Ultrahuman had been in talks with SoftBank for a $35-40 million round, but the deal collapsed due to differences over round size and valuation. “At the time of the SoftBank discussions, which was more than…