converting json file into R/text file without execution

Question

Rstudio has crashed while working and the unsaved files were not able to be loaded into the session. But the files are available in the JSON format. An example,

{
    "contents" : "library(hgu133a.db)
x <- hgu133aENSEMBL
x
length(x)
count.mappedkeys(x)
x[1:3]
links(x[1:3])

## Keep only the mapped keys
keys(x) <- mappedkeys(x)
length(x)
count.mappedkeys(x)
x # now it is a submap

## The above subsetting can also be achieved with
x <- hgu133aENSEMBL[mappedkeys(hgu133aENSEMBL)]

",
    "created" : 1463131195093.000,
    "dirty" : true,
    "encoding" : "",
    "folds" : "",
    "hash" : "1482602869",
    "id" : "737C178C",
    "lastKnownWriteTime" : 0,
    "path" : null,
    "project_path" : null,
    "properties" : {
        "tempName" : "Untitled3"
    },
    "source_on_save" : false,
    "type" : "r_source"
}

The JSON format files can be read using the jsonlite::fromJSON and the required information was stored in contents variable. When tried to read the commands using the readLines() or scan() the commands were being executed instead of converting them into a simple file. How to convert this into a r file ?

output(?):command in a r script/text file.

library(hgu133a.db)
x <- hgu133aENSEMBL
x
length(x)
count.mappedkeys(x)
x[1:3]
links(x[1:3])

## Keep only the mapped keys
keys(x) <- mappedkeys(x)
length(x)
count.mappedkeys(x)
x 
# now it is a submap

## The above subsetting can also be achieved with
x <- hgu133aENSEMBL[mappedkeys(hgu133aENSEMBL)]

Answer 1

If anyone looking for answer to this question, the command suggested by @Kevin worked.

writeLines(json$contents, con = "/path/to/file.R")

Output:

library(hgu133a.db)
x <- hgu133aENSEMBL
x
length(x)
count.mappedkeys(x)
x[1:3]
links(x[1:3])

## Keep only the mapped keys
keys(x) <- mappedkeys(x)
length(x)
count.mappedkeys(x)
x # now it is a submap

## The above subsetting can also be achieved with
x <- hgu133aENSEMBL[mappedkeys(hgu133aENSEMBL)]