{
  "manageEntity": {
    "action": "Create",
    "entityId": "1260515867",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"Fire!!\",\"entity_id\":387089682,\"track_timestamp_s\":53}}",
    "nonce": "0x6ce343ef780abb64acf25e1969d5b3633d98ee2729908ebea6846682c40c2e32",
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    "signer": "0x3256Bd2D0B1984E7df4FA525017aD9bA48470760",
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}