Here it is

https://www.thelancet.com/journals/lanres/article/PIIS2213-2600(20)30418-5/fulltext

An interesting case description with plenty of data, but on the authors' own admission it's not possible to know if the improvement was going to happen anyway. In particular, the number of viruses in the patient's blood had already started to decline before the soluble ACE2 was infused. But certainly worth pursuing with a clinical trial.