{
  "manageEntity": {
    "action": "Create",
    "entityId": "1708187202",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":20,\"entity_id\":1639909559,\"body\":\"this is great\",\"track_timestamp_s\":59}}",
    "nonce": "0x2a95ddf3e495a0624281e998e6e48ac1c0f148c584be169634cded447c7fd690",
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}