How to provide multiple values for RTP when using groovy and REST API

How to provide multiple values for RTP when running a business rule from REST API and groovy?

Below is the code I am using: When I provide single value for RTP it is working. When I provide multiple values or @IDescendants(M107,0), getting the below error {"links":null,"descriptiveStatus":"Error","status":1,"jobId":-1,"jobName":null,"details":"The member "[EE1082, EE1060, EE1084, M107]" does not exist for the specified cube or you do not have access to it."}

/* RTPS:{Pipe_Entity} */
def EntityVar = rtps.Pipe_Entity.members.name
HttpResponse<String> jsonResponse = operation.application.getConnection("Loopback_Rest").post('/rest/v3/applications/{application name}/jobs')