Some people are "losing their heads" (pun intended) over this tweet, so let me clear something: beheading your enemy was a quite widespread practice not only in Central Asia but in many other places until a century ago. Russians did the same to their enemies.
There are countless pictures of Spanish soldiers with beheaded Moroccan prisoners (not going to share their pics, just Google it). In France there is literally a museum with the heads of beheaded Algerians. So do not get ahead of yourselves, guys.
Short thread on the Kushan Emperors and their administration
It is unknown but probable that the Kushan emperors had some kind of council to advise them. Directly responsible to the emperor were generals of the army (named "Kara-Irango" in Bactrian, Surkh Kotal) and military...
officers such as the "Kanarang" ("warden of the marches"). Civil officials existed, most of whom continuations from earlier periods and empires, such as the Greco-Bactrians. After conquering the Subcontinent, some Indian titles were also embraced by the Kushans.
For example, "Dandanayaka" which has been explained as a chief of police, general of the army, judge, or perhaps something else.
Unfortunately there is not enough evidence to reconstruct a picture of the local administration.