localhost:8181/rests/operations/network-topology-pcep:update-lsp 

{
    "input": {
        "node": "pcc://127.0.0.1",
        "name": "pcc_127.0.0.1_tunnel_1",
        "network-topology-ref": "/network-topology:network-topology/network-topology:topology[network-topology:topology-id='pcep-topology']",
        "arguments": {
            "ero": {
                "subobject": [
                    {
                        "ip-prefix": {
                            "ip-prefix": "10.190.204.1/32"
                        },
                        "loose": false
                    },
                    {
                        "ip-prefix": {
                            "ip-prefix": "10.190.201.3/32"
                        },
                        "loose": false
                    }
                ]
            }
        }
    }
}

Frame 3845: 112 bytes on wire (896 bits), 112 bytes captured (896 bits) on interface any, id 0
Linux cooked capture v1
Internet Protocol Version 4, Src: 127.0.0.1, Dst: 127.0.0.1
Transmission Control Protocol, Src Port: 4189, Dst Port: 33823, Seq: 9, Ack: 9, Len: 44
Path Computation Element communication Protocol
    Path Computation LSP Update Request (PCUpd) Header
    SRP object
    LSP object
        Object Class: LSP OBJECT (32)
        0001 .... = LSP Object-Type: LSP (1)
        .... 0000 = Object Header Flags: 0x0
        Object Length: 8
        .... .... 0000 0000 0000 0000 0001 .... = PLSP-ID: 1
        Flags: 0x001000
            .... .... .... ...0 = Delegate (D): Not set
            .... .... .... ..0. = SYNC (S): Not set
            .... .... .... .0.. = Remove (R): Not set
            .... .... .... 0... = Administrative (A): Not set
            .... .... .000 .... = Operational (O): DOWN (0)
            .... .... 0... .... = Create (C): Not set
            .... 0000 .... .... = Reserved: Not set
    EXPLICIT ROUTE object (ERO)