{
  "manageEntity": {
    "action": "Create",
    "entityId": "997743460",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":20,\"entity_id\":227780508,\"body\":\"\u003c3 \u003c3\",\"comment_id\":997743460,\"track_timestamp_s\":100,\"mentions\":[]}}",
    "nonce": "0xbf8aefee3c5e0217a0d7b99022ac0c80455fb8602d32728a37490852069854fc",
    "signature": "0x8338384722d8fe9c804e413c7f7f998f623a6d78f0935a4b4fa8853cf5437578662622a05650ad1b85423e70d68c35f7415336ebc7428f9f38f74f9422399b091b",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}