i have a data URL (TICKET from the previous json) that i want to transfer to image, however, i use the convert from/to block but i dont know why it said that nothing to return?
This is a bit tricky I am afraid. It appears the Convert to/from binary data node is struggling with reading data from arrays like the body field on your screenshot. In addition, it would expect the field name rather than the actual value in the “Source Key” field. Lastly, it appears your TICKET data is a URI rather than a raw base64 value, so you’d need to first extract the value itself.
So you’d need to
Use an Item Lists node to split out your body array
Extract the base64 value itself using a Set node
Set up the Convert to/from binary data node itself