{
  "manageEntity": {
    "action": "Create",
    "entityId": "607426159",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":181,\"entity_id\":858774723,\"body\":\"WHAAAAA\",\"comment_id\":607426159,\"track_timestamp_s\":49,\"mentions\":[]}}",
    "nonce": "0x59f7676aa57422bada81731afe4c8874cf82ebd25d1687e277dd67ff576f8809",
    "signature": "0x13a93c6f5aa61b7cf04f5e813c6fe70a45dd2a12950b4f451f0479c7160022a303783a33acaedf731583e24bb5253ace4296db4284e2217ca29c58d5a6393b681c",
    "signer": "0x4e636627B2C38e64C8D3aF5889767393B4fE6C1A",
    "userId": "181"
  }
}