v4_1 API get_relationships

i am sending the following to the API…

{ “session”:“8vd0n6a1a7k9p8sik9q0bu7db7”,
“module_name”:“REG_Registration_Periods”,
“module_id”:“e73e7307-a5a8-b60e-c052-57f2e37f27b0”,
“link_field_nake”:“reg_registrations_reg_registration_periods”,
“related_module_query”:“1=1”,
“related_fields”:"[‘id’,‘name’,‘description’,‘loss_factor’]",
“related_module_link_name_to_fields_array”:"[]",
“delete”: 0 }

it is returning the proper number of results, but as you can see from the response below, 1) the IDs are blank, 2) what i am putting into “related_fields” is having any kind of effect.

Array
(
[entry_list] => Array
(
[0] => Array
(
[id] =>
[module_name] => REG_Registrations
[name_value_list] => Array
(
[deleted] => Array
(
[name] => deleted
[value] => 0
)

                        [enrollment_status] => Array
                            (
                                [name] => enrollment_status
                                [value] => Needs_Documents
                            )

                    )

            )

        [1] => Array
            (
                [id] => 
                [module_name] => REG_Registrations
                [name_value_list] => Array
                    (
                        [deleted] => Array
                            (
                                [name] => deleted
                                [value] => 0
                            )

                        [enrollment_status] => Array
                            (
                                [name] => enrollment_status
                                [value] => Needs_Documents
                            )

                    )

            )

        [2] => Array
            (
                [id] => 
                [module_name] => REG_Registrations
                [name_value_list] => Array
                    (
                        [deleted] => Array
                            (
                                [name] => deleted
                                [value] => 0
                            )

                        [enrollment_status] => Array
                            (
                                [name] => enrollment_status
                                [value] => Needs_Documents
                            )

                    )

            )

        [3] => Array
            (
                [id] => 
                [module_name] => REG_Registrations
                [name_value_list] => Array
                    (
                        [deleted] => Array
                            (
                                [name] => deleted
                                [value] => 0
                            )

                        [enrollment_status] => Array
                            (
                                [name] => enrollment_status
                                [value] => Needs_Documents
                            )

                    )

            )

nevermind. got it. needed to send array not string with json array in it.