Problem with Bitrix API Call imopenlines.crm.message.add method, 'CRM_ENTITY_TYPE' is null or empty

:bullseye: What is your goal?

Hi, I am trying to send a message via Bitrix open channel.

:thinking: What is the problem & what have you tried?

I’m using the API call module with method imopenlines.crm.message.add, followig bitrix API docs, but i’m getting error “[400] Argument ‘CRM_ENTITY_TYPE’ is null or empty”

:clipboard: Error messages or input/output bundles

[400] Argument ‘CRM_ENTITY_TYPE’ is null or empty

Input bundle:
[
{
“url”: “/imopenlines.crm.message.add”,
“body”: “{"CRM_ENTITY_TYPE":"DEAL","CRM_ENTITY":25173,\n "USER_ID": 1,\n "CHAT_ID": 267,\n "MESSAGE":"Mensaje desde Make" \n}”,
“method”: “GET”,
“headers”: [
{
“key”: “Content-Type”,
“value”: “application/json”
}
]
}
]

:camera_with_flash: Screenshots (scenario flow, module settings, errors)

I changed to POST (i thought I had set it correctly) and changed CRM_ENTITY_TYPE to “deal” (lowercase), but I still get the same error.

This is my scenario: Integration Bitrix24 - Make.com Automation Scenario