{
  "manageEntity": {
    "action": "Create",
    "entityId": "1517620646",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":20,\"entity_id\":468130493,\"body\":\"LETS GOOOO!\",\"track_timestamp_s\":37}}",
    "nonce": "0x415979ae11049fe73a7f3eac84c1f2cd99a62b940465328c3c4eb37c23e61bc8",
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    "userId": "20"
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}