{
  "manageEntity": {
    "action": "Create",
    "entityId": "4584935",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"Inbox me \",\"entity_id\":1088997761,\"track_timestamp_s\":20}}",
    "nonce": "0x06fe3729cb80030ec36f4183110d40ed46a232a20819689d59d64a661c4eded2",
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    "signer": "0x1788E4C39d3326e598F16767C69826869594E359",
    "userId": "116504833"
  }
}