Follow JSON logs formatted using jq. You can also pass jq options after the filename for filtering.

jqlog.sh

#!/usr/bin/bash
set -eo pipefail
RED=$(echo -e '\033[0;1;31m')
NORMAL=$(echo -e '\033[0m')
if [[ $# -lt 1 ]]; then
    echo "usage: $0 <logfile> [jq-options...]">&2
    exit 1
fi
logfile=$1
shift
tail -f "$logfile" | while read -r line; do
    echo "$line"|jq "$@" 2>/dev/null || echo "$RED$line$NORMAL"
done