Add instruments to entity


The unit21_id field is being deprecated for this endpoint after September 30, 2023. Requests made using unit21_id in the path will fail. entity_id should be used instead. More information.

Associate an entity with an array of instruments.

Specify the instrument_id of the instrument when associating instruments.

Placeholder entities cannot be updated.

If we do not find any instruments with a corresponding instrument_id in our system, we will create a placeholder for it.

Instrument details can then be supplemented through the /instruments/create or /instruments/update endpoints.

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