API - POST Member Format

[TomTucka18]

I'm trying to adjust custom user fields using the however I'm fairly new to REST API's and can't work out the format for the customFields parameter. The API reference says:

Array of custom fields as fieldId => fieldValue

Yet when i pass the following to it nothing gets changed on the user:

{'field_2'=>'value', 'field_4'=>'value'}

Could someone please let me know what the correct format for setting the custom fields are when using this endpoint via a POST request? Thanks.

[newbie LAC]

 

[TomTucka18]

Perfect, thank you. Will remember to search that sub forum too next time