Although we do not provide REST API support for Power Custom Fields PRO at the moment, if you want only to set some certain values for a field using Jira 's REST API, there is a possibility. In order to do this, you need to use the same syntax as when setting a default value.
The value should have the following format:
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{"label": "", "value": "<issue id>"} |
An Here you can see an example of how to use it is represented below:
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{"label": "", "value": "10000"} |
...