Bash – How to post logs to Cloudwatch with CLI

Im tring to create a bash script that checks the status of the website, Im using this command:

This one to create the logstream

aws logs create-log-stream --log-group-name "WebsiteStatusMessage" --log-stream-name $timestamp

This other one to post the logs

aws logs put-log-events --log-group-name "WebsiteStatusMessage" --log-stream-name "$timestamp" --log-events file://$iam/logsoutput.json

logsoutput.json

 [ 
   { 
     "timestamp": 202006041832, 
     "message": "test event1" 
   } 
 ]

And when I execute the command or the script it shows this message:

{
    "rejectedLogEventsInfo": {
        "tooOldLogEventEndIndex": 1
    }
}

And also this other message on console:

Expecting property name enclosed in double quotes: line 6 column 2 (char 84)

Bash script code

#!/bin/bash

#variables
iam=$(pwd)
timestamp=$(date +"%Y%m%d%H%M")
instance_id="i-######"

#Read line per line and storage it on a array
getArray()
{
array=()
  while IFS= read -r line
  do
       array+=("$line")
   done < "$1"
}
getArray "$iam/sites.txt"


#working
for url in "${array[@]}"
do
  echo "The website is: $url"
  STATUS=$(curl -s -o /dev/null -w "%{http_code}\n" $url)
    if [ "$STATUS" == "200" ] || [ "$STATUS" == "301" ] || [ "$STATUS" == "302" ]; then
        echo "$url is up, returned $STATUS"
    else
        echo "$url is not up, returned $STATUS"
###
# This will send the metric to metrics Cloudwatch
###

        rm $iam/metricsOutput.json
        echo " [ " >> $iam/metricsOutput.json
        echo " { " >> $iam/metricsOutput.json
        echo " \"MetricName\": \"SiteStatus\", " >> $iam/metricsOutput.json        
        echo " \"Timestamp\": \"$timestamp\", " >> $iam/metricsOutput.json
        echo " \"Value\": 1, " >> $iam/metricsOutput.json
        echo " } " >> $iam/metricsOutput.json
        echo " ] " >> $iam/metricsOutput.json


        aws cloudwatch put-metric-data --namespace "Custom-2" --metric-data file://$iam/metricsOutput.json


###
# This sends the message to logstream on Cloudwatch
###
        rm $iam/logsoutput.json
        echo " [ " >> $iam/logsoutput.json
        echo " { " >> $iam/logsoutput.json
        echo " \"timestamp\": $timestamp, " >> $iam/logsoutput.json
        echo " \"message\": \"test event1\" " >> $iam/logsoutput.json
        echo " } " >> $iam/logsoutput.json
        echo " ] " >> $iam/logsoutput.json

        aws logs create-log-stream --log-group-name "WebsiteStatusMessage" --log-stream-name $timestamp
        aws logs put-log-events --log-group-name "WebsiteStatusMessage" --log-stream-name "$timestamp" --log-events file://$iam/logsoutput.json


    fi
done

I tried with different json structures but still nothing, any idea?
(The aws cli have full cloudwatch permissions)