{
  "manageEntity": {
    "action": "Create",
    "entityId": "142500598",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"Nice\",\"entity_id\":247882355,\"track_timestamp_s\":0}}",
    "nonce": "0x03b11e34a0f832e954f576542dbc42fb80849959fd8938edf22d3404fcb6067c",
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    "userId": "589495545"
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}