How to define single bracelet parameters in helm values

How to define values file so that the Telegraf conf will have following row
`tags = {tag1 = "foo", tag2 = "bar"}
`

When i define it in Helm values like following :
`tags: '{tag1 = "foo", tag2 = "bar"}'`

result will be

`tags = "{ \"foo\", tag2 = \"bar\" }"`

and telegraf will throw error

Start by tracing how the Helm values are rendered into the Telegraf configuration, using helm template to compare the supplied value with the generated row. The work is done when a values definition produces the requested tags table without Telegraf reporting a configuration error.

Written by the indexing model from the issue text.