The Sweden international shone last season during a loan spell with Dutch giants Feyenoord, netting 20 goals and grabbing eight assists in just 23 Eredivisie appearances.
Unsurprisingly, the 20-year-old's performances caught the eye of several clubs and Jonsson has confirmed that Roberto Mancini's side are currently in negotiations over an exit.
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"Right now there are negotiations with City. It's up to them, but I believe everything will work out in the end."
However, Jonsson went on to downplay reports of his client potentially moving to Serie A to join recently promoted Siena.
"I have daily contact with John and his father, Mike. Mike was annoyed when I talked to him," he added.
“When he read the news of Siena he asked: 'What the hell is this?' They know more than I do."