{
  "manageEntity": {
    "action": "Create",
    "entityId": "859682570",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"Cool\",\"entity_id\":18664634,\"track_timestamp_s\":27}}",
    "nonce": "0x20c4d958d3218240ea92c0068d007d6dbaaf765830db2084691b13137532aa5d",
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    "userId": "589472286"
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}