{
	"webhookTrigger": {
		"headers": {
			"content_type": "application/json",
			"host": "flow.zoho.in:443",
			"connection": "close",
			"content_length": 474,
			"accept": "application/json"
		},
		"payload": {
			"instanceId": 311610,
			"messages": [
				{
					"chatId": "919814999991@c.us",
					"messageNumber": 50297,
					"author": "919814888881@c.us",
					"ack": 1,
					"chatName": "Sushant",
					"fromMe": true,
					"body": "Lead000001 nextcall 60",
					"type": "chat",
					"senderName": "Nirmal",
					"self": 0,
					"id": "true_919814999991@c.us_0757B02CBE43EF4797D23D222E64FD87",
					"time": 1628072466,
					"isForwarded": 0
				}
			]
		}
	}
}

I need to extract the body and the chatId.

I created a variable "received_message" and linked it to ${webhookTrigger.payload.messages}

But the thing is, it attains a text value as the messages contains square brackets [ ]

How do I extract the data in body and chatId?