Yes! wip on payload schema..

                    interfaceId: 10923537602090224694
                    methodId: 0
                    params: Payload
                        (raw struct)
                            Data offset: 1
                            Data ( 0 words )
                            Pointers: 2
                                Data ( 16 bytes )
                        Fields
                            content: evaluate$Params
                                (raw struct)
                                    Data offset: 1
                                    Data ( 0 words )
                                    Pointers: 1
                                        Data ( 8 bytes )
                                Fields
                                    expression: Expression, union: literal
                                        (raw struct)
                                            Data offset: 0
                                            Data ( 2 words )
                                                Data ( 16 bytes )
                                                Union, tag: 0 ( literal )
                                            Pointers: 2
                                                Data ( 16 bytes )
                                        Fields
                                            literal: <field type not dissected> float64
                            capTable: 0 items