update order base refnum using rest api

Summary:

Need to update sepecific order base refnum using rest api

Content (please ensure you mask any confidential information):

Hi,

i need to update specific order base refnum using REST api

according to documentation :

it provides the api url

/orderBases/{orderBaseGid}/refnums/{obRefnumQualGidxobRefnumValue}

but i can't find a sample request body

when trying this body:

  {         "obRefnumValue": "qwqwq"   }

i got this error:

{    "status": 404,    "title": "Not Found",    "detail": "The requested resource is not available."}

this is my api

/logisticsRestApi/resources-int/v2/orderBases/TM.300000007916707/refnums/TM.AGENTxAA

need request body sample to update the refnum (TM.AGENT) has a value 'AA'

thank u