#include <sourcemod>
public OnPluginStart()
{
  HookEvent("player_hurt",Event_PlayerHurt);
}
public Action:Event_PlayerHurt(Handle:event,const String:name[],bool:dontBroadcast)
{
  cash = FindSendPropOffs("CSSPlayer","m_iAccount");
  client = GetClientOfUserId(GetEventInt(event,"userid"));
  damage = GetEventInt(event,"dmg_health");
  GetEntData(cleint,cash,....
  SetEntProp(client,Prop_Send,"m_iAccount",damage)
}