Nifi : Is it possible to create multiple flow file based on attributes ?

Hello,

I receive a json from a HTTP Request. It looks like this : 

{
  "accessToken" : "token",
  "expiresIn" : "12600",
  "refreshToken" : "token",
  "tokenType" : "Bearer",
  "usagePointsId" : "22516914714270, 22516914714270, 22516914714270"
}

I have the usagePointsId key containing a string with multiple values. 
I will need each values to include them in different API calls.
I would therefore like to be able to separate the string at the comma level to extract each value.
Then the idea is to create a new unique flow file for each value. This value would be associated with a "usagePointId" attribute which would be used in my API calls. Also, the others json key would be added as Attributes for each flow files

I don't know if it's possible to create multiple differents flow file based on a split attributes. 
I tried to use the ExecuteScript (with ECMASCRIPT) to split the string and create Flow Files with something like this :

flowFile = session.get()

if (!flowFile) return
usagePointsId = flowFile.getAttribute('usagePointsId')
splitStr = usagePointsId.split(",");
let attrs = []

for (let i = 0; i < spltStr.length, i+) {
	newFlowFile = session.create()
	newFlowFile = session.write(newFlowFile, splitStr[i] )
	session.transfer(newFlowFile, REL_SUCCESS)
}

Someone could help me with that kind of issue ?

Thanks