Adding path values to events

Is it possible to do this.  I have searched in vain.  

{
			"conditions": {
				"all": [
					{
						"fact": "BENEFIT",
						"operator": "greaterThan",
						"value": 80
					}
				]
			},
			"event": {
				"type": "TEST1",
				"params": {
					"RCPT_TOT": "$.RCPT_TOT"  // Want to pass the value in the event ?????
				}
			}
		}