Importing data with {} braces

Hello, we are running an import that requires the imported field data to contain {} brackets (see below)

Example 1:
{“administrator”:{“role_price”:”123″},”wholesale”:{“role_price”:”123″},”wholesale_cod”:{“role_price”:”123″}}

We are replacing the value “123” with mapped data {wsincgst[1]} and looks like the following in our WP All Import custom field settings:

Example 2:
{“administrator”:{“role_price”:”{wsincgst[1]}”},”wholesale”:{“role_price”:”{wsincgst[1]}”},”wholesale_cod”:{“role_price”:”{wsincgst[1]}”}}

Using this configuration results in the imported data being incomplete as follows:

Example 3:
“},”wholesale”:”},”wholesale_cod”:”}}

I understand this will be due to the usage of {} brackets, is there a way we can ensure the remaining data is also imported along with the mapped field? The end result in the field should appear the same as in example 1.

Many thanks!