How to save data load rule through REST API

Summary

executing data load rule daily with different filenames

Content

We have been trying to import the GL balances on daily basis into ARCS through our integration layer. While doing that, the integration layer produces new filename every day which gets pushed into data management inbox folder. 

We tried this to run the data rule with new filename . But this dont save the actual data load rule definition and neither imports the data into GL.

https://xyz/aif/rest/V1/jobs

{"jobType":"DATARULE",
"jobName":"DL_ARCS_RGL_Interco",
"startPeriod":"Aug-20",
"endPeriod":"Aug-20",
"importMode":"REPLACE",
"exportMode":"NONE",
"fileName":"arcs-202012916057.csv"
}

we then tried this