Loan and LOC Metadata Merging

We have updated how metadata objects are modified for both loan and line of credit accounts. Previously, any update to a metadata object overwrite the entirety of the object. Now, LMS will merge the updated data with the current values.
To add or update new key-value pairs using the API, include them in the payload.
To remove a key-value pair using the API, include the key and set its value to null.