Loop throught context (ctx) data model result at action template in SLACK text field

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1

How can loop over array result when integrate with slack using message template?

At kibana monitor to over an array example:

{{#ctx.results.0.hits.hits}} // Loop over hits
   {{_source.message}}
   {{_source.module_name}}
   {{_source.trace_id}}
{{/ctx.results.0.hits.hits}}

That's works, but how can I integrate it with slack message template but the loop at text field?

My attempt:

{
"text":"{{#ctx.results.0.hits.hits}} 
{{_source.message}} 
_service_: {{_source.service}}
_uri_: {{_source.uri}}
{{/ctx.results.0.hits.hits}}"
"channel": "#my-channel-to-alert",
"username": "Monitor Name",
"icon_emoji": ":exploding_head:"
}

I tried it but receive a bad request from action action send message test:

action_results: {,…}
MrJsQXoBG1Y5JW62_aE0: {id: "MrJsQXoBG1Y5JW62_aE0", name: "circuit-breaker-opened-action", output: {}, throttled: false,…}
error: "java.io.IOException: Failed: HttpResponseProxy{HTTP/1.1 400 Bad Request [date: Fri, 25 Jun 2021 16:24:24 GMT, server: Apache, strict-transport-security: max-age=31536000; includeSubDomains; preload, x-slack-backend: r, access-control-allow-origin: *, x-frame-options: SAMEORIGIN, vary: Accept-Encoding, referrer-policy: no-referrer, content-type: text/html, x-envoy-upstream-service-time: 17, x-backend: main_normal main_canary_with_overflow main_control_with_overflow, x-server: slack-www-hhvm-main-iad-17t3, x-via: envoy-www-iad-3oio, haproxy-edge-iad-e6hp, x-slack-shared-secret-outcome: shared-secret, via: envoy-www-iad-3oio, transfer-encoding: chunked] ResponseEntityProxy{[Content-Type: text/html,Chunked: true]}}"
2

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