{
  "manageEntity": {
    "action": "Create",
    "entityId": "380309865",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"Nice\",\"entity_id\":1540765994,\"track_timestamp_s\":78}}",
    "nonce": "0x694c12660b4e7a31203d4b650733178f98d2593900c5086a039a47378f2c1f7f",
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    "signer": "0x7Fa5a67C00c48DCA54f12c80579B583FcD79a330",
    "userId": "527480232"
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}