How to get a json variable with jsaw from linux?

I would like to request help to achieve the following:

My idea is an automatic updater of the Minecraft server, without human intervention

I tried to search the Internet, but I can not see how to do it

The code that was being used at the time was the following

        cd /juegos/Minecraft/Release/
    VER='curl -s https://launchermeta.mojang.com/mc/game/version_manifest.json | jsawk -n 'out(this.latest.release)''
    echo $VER $1
    wget -N https://s3.amazonaws.com/Minecraft.Download/versions/"$VER"/minecraft_server."$VER".jar
    find . -type f \( -iname "minecraft_*.jar" ! -iname "*.$VER.jar" \) -delete
    screen -A -m -d -S Minecraft_Release java -Xmx2048M -Xms1024M -jar minecraft_server.$VER.jar

The problem that currently exists is that the url does not work:

https://s3.amazonaws.com/Minecraft.Download/versions/"$VER"/minecraft_server."$VER".jar

I get the version with the

VER='curl -s https://launchermeta.mojang.com/mc/game/version_manifest.json | jsawk -n 'out(this.latest.release)''

Right now by accessing the link we see this

This code below belongs to version_manifest.json

"latest": 
    {
        "release": "1.13.1", 
        "snapshot": "1.13.1"
    }, 
        "versions":[
            {
                "id": "1.13.1", 
                "type": "release", 
                "url": "https://launchermeta.mojang.com/v1/packages/bbed6214da465e25f769366835b7321d5380a1fa/1.13.1.json", 
                "time": "2018-09-10T15:44:04+00:00", 
                "releaseTime": "2018-08-22T14:03:42+00:00"}, 
            {
                "id": "1.13.1-pre2", 
                "type": "snapshot", 
                "url": "https://launchermeta.mojang.com/v1/packages/1594d6f7242d2065c2b61c242397f40677e5123c/1.13.1-pre2.json", 
                "time": "2018-09-06T10:02:33+00:00", 
                "releaseTime": "2018-08-20T13:52:09+00:00"

But I do not know how to get the value

"url": "https://launchermeta.mojang.com/v1/packages/bbed6214da465e25f769366835b7321d5380a1fa/1.13.1.json"

since I think the jsawk makes the code sh simpler

Once you get the url as a variable

" link "

I could already get your download url

{
"arguments": 
    {
        "game": 
            [
                "--username", 
                "${auth_player_name}", 
                "--version", 
                "${version_name}", 
                "--gameDir", 
                "${game_directory}", 
                "--assetsDir", 
                "${assets_root}", 
                "--assetIndex", 
                "${assets_index_name}", 
                "--uuid", "${auth_uuid}", 
                "--accessToken", 
                "${auth_access_token}", 
                "--userType", 
                "${user_type}", 
                "--versionType", 
                "${version_type}", 
                {
                    "rules": 
                    [
                        {
                            "action": "allow", 
                            "features": 
                                {"is_demo_user": true}
                        }
                    ], 
                    "value": "--demo"
                }, 
                {
                    "rules": 
                    [
                        {
                            "action": "allow", 
                            "features": 
                                {
                                    "has_custom_resolution": true
                                }
                        }
                    ], 
                    "value": 
                        [
                            "--width", 
                            "${resolution_width}", 
                            "--height", 
                            "${resolution_height}"
                        ]
                }
            ], 
        "jvm": 
            [
                {
                    "rules": 
                    [
                        {
                            "action": "allow", 
                            "os": {"name": "osx"}
                        }
                    ], 
                    "value": 
                    ["-XstartOnFirstThread"]
                }, 
                {
                    "rules": 
                    [
                        {
                            "action": "allow", 
                            "os": {"name": "windows"}
                        }
                    ], 
                    "value": "-XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump"
                }, 
                {
                    "rules": 
                        [
                            {
                                "action": "allow", 
                                "os": {"name": "windows", "version": "^10\."}
                            }
                        ], 
                    "value": ["-Dos.name=Windows 10", "-Dos.version=10.0"]
                }, 
                {
                        "rules": 
                        [
                            {
                                "action": "allow", 
                                "os": {"arch": "x86"}
                            }
                        ], 
                        "value": "-Xss1M"
                }, 
                "-Djava.library.path=${natives_directory}", 
                "-Dminecraft.launcher.brand=${launcher_name}", 
                "-Dminecraft.launcher.version=${launcher_version}", 
                "-cp", 
                "${classpath}"]}, 
                "assetIndex": 
                    {
                        "id": "1.13.1", 
                        "sha1": "68182cfc27e6807e7230740abb9e5ea56db7d0bf", 
                        "size": 181977, 
                        "totalSize": 186655692, 
                        "url": "https://launchermeta.mojang.com/v1/packages/68182cfc27e6807e7230740abb9e5ea56db7d0bf/1.13.1.json"}, 
                        "assets": "1.13.1", 
                        "downloads": 
                        {
                            "client": 
                                {
                                    "sha1": "8de235e5ec3a7fce168056ea395d21cbdec18d7c", 
                                    "size": 16088559, 
                                    "url": "https://launcher.mojang.com/v1/objects/8de235e5ec3a7fce168056ea395d21cbdec18d7c/client.jar"
                                }, 
                            "server": 
                                {
                                    "sha1": "fe123682e9cb30031eae351764f653500b7396c9", 
                                    "size": 33832589, 
                                    "url": "https://launcher.mojang.com/v1/objects/fe123682e9cb30031eae351764f653500b7396c9/server.jar"
                                }

The code continues

It will be achieved this

                            "server": 
                                {
                                    "sha1": "fe123682e9cb30031eae351764f653500b7396c9", 
                                    "size": 33832589, 
                Nueva variable >>   "url": "https://launcher.mojang.com/v1/objects/fe123682e9cb30031eae351764f653500b7396c9/server.jar"
                                }

Is it possible to do it ?? I'm sorry but I do not control anything from json or jsaw. Nor am I going to lie that the first sh code looks for it on the Internet.

Warm regards and thanks to everyone who can help me