{
  "manageEntity": {
    "action": "Create",
    "entityId": "619265770",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":20,\"entity_id\":1847463639,\"body\":\"fiyuh\",\"track_timestamp_s\":64}}",
    "nonce": "0xd6b8cb7fd5f01de7ed246ed0ef79dbe573247fe29d3ed9affc1a094efd05334f",
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    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "20"
  }
}