How to publish attributes to mqtt sensor?

Configuration
1

I’m trying to send json to an mqtt sensor such that the data shows up as attributes on the sensor. I need it this way because that’s how the custom list-card requires it.

Here is my mqtt sensor in configuration.yaml:

  - platform: mqtt
    name: Traffic Accidents
    state_topic: 'accidents'
    value_template: "{{ value_json }}"
    json_attributes:
      - incident_type
      - status
      - time
      - county
      - location

Below is the json I’m publishing to the topic accidents. When I publish this, nothing shows up in the attributes nor state of the sensor. If I send just one incident instead of several like below, the json shows up in the state of the sensor and not the attributes. I have no idea what I’m doing wrong.

[
    {
        "Incident_Type": "COLLISION:NO INJURY",
        "Status": "IN PROGRESS",
        "Time": "18:08",
        "County": "ANDERSON",
        "Location": "MICHELIN BLVD x[DOBBINS BRIDGE RD]"
    },
    {
        "Incident_Type": "COLLISION:INJURIES",
        "Status": "ROADWAY BLKD",
        "Time": "20:23",
        "County": "ANDERSON",
        "Location": "E RIVER ST x[ESTES DR]"
    },
    {
        "Incident_Type": "COLLISION:PRIV PROP",
        "Status": "IN PROGRESS",
        "Time": "20:38",
        "County": "ANDERSON",
        "Location": "4123 CLEMSON BLVD [X2[SC28]]  x[US76]"
    },
    {
        "Incident_Type": "COLLISION:NO INJURY",
        "Status": "IN PROGRESS",
        "Time": "17:43",
        "County": "GREENVILLE",
        "Location": "8874 N TIGERVILLE RD x[BELK RD]"
    },
    {
        "Incident_Type": "COLLISION:NO INJURY",
        "Status": "IN PROGRESS",
        "Time": "18:19",
        "County": "GREENVILLE",
        "Location": "WADE HAMPTON BLVD x[EDWARDS MILL RD]"
    },
    {
        "Incident_Type": "HIT & RUN:NO INJURY",
        "Status": "IN PROGRESS",
        "Time": "19:40",
        "County": "GREENVILLE",
        "Location": "BRUCE RD x[E DORCHESTER BLVD]"
    },
    {
        "Incident_Type": "ASSIST MOTORIST",
        "Status": "ROADWAY BLKD",
        "Time": "19:52",
        "County": "GREENVILLE",
        "Location": "MARTIN RD x[GREENPOND RD]"
    },
    {
        "Incident_Type": "DEBRIS IN ROADWAY",
        "Status": "IN PROGRESS",
        "Time": "19:55",
        "County": "GREENVILLE",
        "Location": "I85 [49SB]"
    },
    {
        "Incident_Type": "COLLISION:NO INJURY",
        "Status": "IN PROGRESS",
        "Time": "20:12",
        "County": "GREENVILLE",
        "Location": "BLAKELY AVE x[US25]"
    },
    {
        "Incident_Type": "HIT & RUN:NO INJURY",
        "Status": "IN PROGRESS",
        "Time": "20:28",
        "County": "GREENVILLE",
        "Location": "I85 [51SB]"
    },
    {
        "Incident_Type": "HIT & RUN:PRIV PROP",
        "Status": "IN PROGRESS",
        "Time": "20:22",
        "County": "SPARTANBURG",
        "Location": "3605 BOILING SPRINGS RD [X2[SC9]]  x[SC9]"
    }
]