The U.S. women's soccer team not only won the World Cup on Sunday -- it broke TV records. The tournament's final match was the most-watched soccer game ever, including men's games, on a single television network. More Americans watched the Women's World Cup final than the most recent NBA or Stanley Cup finals.

Yet FIFA paid the winning women's team a $2 million prize, which is four times less than the $8 million it pays men's teams that lose in the first round. The total payout for the Women’s World Cup this year is $15 million, while FIFA awarded a total of $576 million to men's teams in the World Cup last year.

Ultraviolet, a women's rights advocacy organization, started a digital campaign on Monday to press FIFA to pay women's soccer teams fairly for equal work. Roughly 60,000 people signed the campaign in the first 24 hours -- more than twice the signatures a typical Ultraviolet campaign receives on its first day.