Convert a single JSON to multiple jsons by taking one of the key values? – Amazon Web Sevices

I currently have one json file as follows in terms of formatting:

{
    "Comment":"json data",
    "Changes":[
        {
            "Action":"DELETE",
            "ResourceRecordSet":{
                "Name":"record1",
                "Type":"CNAME",
                "SetIdentifier":"record1-ap-northeast",
                "GeoLocation":{
                    "CountryCode":"JP"
                },
                "TTL":60,
                "ResourceRecords":[
                    {
                        "Value":"record1"
                    }
                ],
                "HealthCheckId":"ID"
            }
        },
        {
            "Action":"DELETE",
            "ResourceRecordSet":{
                "Name":"record2",
                "Type":"CNAME",
                "SetIdentifier":"record2-ap-south",
                "GeoLocation":{
                    "CountryCode":"SG"
                },
                "TTL":60,
                "ResourceRecords":[
                    {
                        "Value":"record2"
                    }
                ],
                "HealthCheckId":"ID"
            }
        },
        {
            "Action":"DELETE",
            "ResourceRecordSet":{
                "Name":"record3",
                "Type":"CNAME",
                "SetIdentifier":"record3-ap-west",
                "GeoLocation":{
                    "CountryCode":"IN"
                },
                "TTL":60,
                "ResourceRecords":[
                    {
                        "Value":"record3"
                    }
                ],
                "HealthCheckId":"ID"
            }
        },
        {
            "Action":"DELETE",
            "ResourceRecordSet":{
                "Name":"record4.",
                "Type":"CNAME",
                "SetIdentifier":"record4",
                "GeoLocation":{
                    "CountryCode":"*"
                },
                "TTL":60,
                "ResourceRecords":[
                    {
                        "Value":"record4-ap-west"
                    }
                ],
                "HealthCheckId":"ID"
            }
        }
    ]
}

The original file has 20000 such values for the "Changes key". I want to create a file with 830 values in each file and create as many files as it creates. In order to achieve this I need it in the below format.

{
    "Comment":"json data",
    "Changes":[
        {
            "Action":"DELETE",
            "ResourceRecordSet":{
                "Name":"record4.",
                "Type":"CNAME",
                "SetIdentifier":"record4", #830 such arrays in each file
                "GeoLocation":{
                    "CountryCode":"*"
                },
                "TTL":60,
                "ResourceRecords":[
                    {
                        "Value":"record4-ap-west"
                    }
                ],
                "HealthCheckId":"ID"
            }
        }
    ]
}

I’ve created the below shell script to do this

#!/bin/bash

# Set the input file name
input_file="input.json"

# Set the output file prefix
output_file_prefix="output"

# Set the number of objects per output file
objects_per_file=830

# Skip the first two lines of the input file
tail -n +3 "$input_file" > temp.json

# Get the total number of lines in the input file
total_lines=$(wc -l < temp.json)

# Calculate the number of output files needed
output_files=$(((total_lines + objects_per_file - 1) / objects_per_file))

# Split the input file into multiple output files
split -l $objects_per_file temp.json "$output_file_prefix"

# Loop through each output file and add the opening and closing square brackets
for file in "$output_file_prefix"*; do
  echo "[" > "$file".json
  cat "$file" >> "$file".json
  echo "]" >> "$file".json
  rm "$file"
done

# Remove the temporary file
rm temp.json

**By using this I am getting the output as expected but it is broken as it is considering 830 lines but not 830 arrays. **
Format:

#start of file
[
{
"Action": "DELETE",
"ResourceRecordSet":
{
  "Name": "record1",
  "Type": "CNAME",
  "SetIdentifier": "record1-ap-northeast",
  "GeoLocation": {
    "CountryCode": "JP"
  },
  "TTL": 60,
  "ResourceRecords": [
    {
      "Value": "record1"
    }
  ],
  "HealthCheckId": "ID"
}
},

#end of file
{
"Action": "DELETE",
"ResourceRecordSet":
{
"Action": "DELETE",
"ResourceRecordSet":
{
  "Name": "record4.",
  "Type": "CNAME",
  "SetIdentifier": "record4"
]

How do I achieve the required result. Due to the character limitation I cannot use more than 830 such arrays in each file?
I tried using jq tool to achieve this but I am completely new with it. Could you please help me with this?