How to upload .json processor group using curl / API

[#1]

Hi, I have a use, where i need to upload the processor group (.json) file from the curl / API. Please suggest. 

OR

can we do this operation in NiFi CLI without using NiFi registry. 

[#2]

Hello Sam! 
i am dealing with same issue as you, i see you made a question a year ago and i wonder, did you find a way to upload a Definition file from API rest ? 

as you i have been tried and tired to build a process group with the file.json but documentation is not clear and does not offer an example to build the request. 

i upload a file.json manually and checked the nifi-request.log and the only i see is this pettiotion " http://localhost:8081/process-groups/{id}/process-groups/upload" as "ok"

did you find a way to build the body to send this request ? 

thanks a lot, have a nice day.