Unable to set JSON log format on cloudwatch

[brunoargolo]

When I locally run ADOT collector with the config below it correctly prints JSON formatted logs to the console.

However when I deploy to ecs fargate, the cloudwatch logs they are not in JSON format.

config.yaml

extensions:
  awsproxy:

receivers:
  otlp:
    protocols:
      grpc:
        endpoint: 0.0.0.0:4317
      http:
        endpoint: 0.0.0.0:4318

processors:
  batch:

exporters:
  debug:
    verbosity: detailed
  awsxray:
    region: eu-west-1
  

service:
  extensions: [awsproxy]
  telemetry:
    logs:
      level: info
      encoding: json
  pipelines:
    traces:
      receivers: [otlp]
      processors: [batch]
      exporters: [awsxray]

Console output locally:
{"level":"info","ts":"2025-02-11T19:57:24.770Z","caller":"extensions/extensions.go:42","msg":"Extension is starting...","kind":"extension","name":"awsproxy"} {"level":"info","ts":"2025-02-11T19:57:24.770Z","caller":"awsproxy@v0.115.0/extension.go:39","msg":"X-Ray proxy server started on localhost:2000","kind":"extension","name":"awsproxy"}

CloudWatch output:
`
2025-02-11T19:57:42.288Z | Span #2

  2025-02-11T19:57:42.288Z | Trace ID : 67ababa1e574f5997db10cb9f7e00cde
  2025-02-11T19:57:42.288Z | Parent ID :
  2025-02-11T19:57:42.288Z | ID : edef07aac44a2a9e
  2025-02-11T19:57:42.288Z | Name : POST
  2025-02-11T19:57:42.288Z | Kind : Client
  2025-02-11T19:57:42.288Z | Start time : 2025-02-11 19:57:21.467 +0000 UTC
  2025-02-11T19:57:42.288Z | End time : 2025-02-11 19:57:41.469642293 +0000 UTC
  2025-02-11T19:57:42.288Z | Status code : Unset
  2025-02-11T19:57:42.288Z | Status message :
  2025-02-11T19:57:42.288Z | Attributes:
  2025-02-11T19:57:42.288Z | -> http.url: Str(https://sqs.eu-west-1.amazonaws.com/)

`
How do I configure it to use JSON format in cloudwatch ?