{
  "manageEntity": {
    "action": "Create",
    "entityId": "308827959",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":906184213,\"track_id\":828497626,\"body\":\"my favorite\",\"track_timestamp_s\":352,\"mentions\":[],\"current_sort\":\"top\",\"new_id\":308827959,\"entity_id\":828497626,\"comment_id\":308827959}}",
    "nonce": "0x57feb6b0218b41ad41bc02fe29d2246eed516398617c8cce074a9b65eb95611c",
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    "signer": "0x4993C3631eecd6e8c1635351A99C2103C7d6Be4b",
    "userId": "906184213"
  }
}