Google tag manager rest api - trigger creation with filter returns an error

I am trying to create a new trigger by using google tag manager rest api and getting this error:

Unable to parse trigger data com.google.analytics.containertag.common.CtApiaryException: trigger.filter[0].parameter[1]: Filter's second argument must be string.

This is my payload:

const body = {
                accountId: googleTagManagerAccountId,
                containerId: containerId,
                workspaceId: workspaceId,
                name: `Bla bla PageViews Disabled JS - ${domainUrl}`,
                type: 'pageview',
                tagFiringOption: 'somePageViews',
                filter: [
                    {
                        parameter: [
                            {
                                type: 'template',
                                value: '{{ my Variable }}',
                                key: 'arg0',
                            },
                            {
                                type: 'boolean',
                                value: 'false',
                                key: 'arg1',
                            },
                        ],
                        type: 'contains',
                    },
                ],
            };

can someone explain me please what is wrong with my code?

Thanks

seems like you are using boolean and value you are passing is in string 'false' so either you need to update value or the parameter should be 'template'

Option 1 : change type in filter

filter: [
                {
                    parameter: [
                        {
                            type: 'template',
                            value: '{{ Cheq Essentials Variable }}',
                            key: 'arg0',
                        },
                        {
                            type: 'template',
                            value: 'false',
                            key: 'arg1',
                        },
                    ],
                    type: 'contains',
                },
            ],

Option 2 : change value as boolean

  filter: [
                    {
                        parameter: [
                            {
                                type: 'template',
                                value: '{{ Cheq Essentials Variable }}',
                                key: 'arg0',
                            },
                            {
                                type: 'boolean',
                                value: false,
                                key: 'arg1',
                            },
                        ],
                        type: 'contains',
                    },
                ],