{
  "manageEntity": {
    "action": "Create",
    "entityId": "622981750",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":20,\"entity_id\":272410988,\"body\":\"fireee\",\"comment_id\":622981750,\"track_timestamp_s\":53,\"mentions\":[]}}",
    "nonce": "0x9a66d0cd99e8a2bba0bd8b70802146778d00a6ad8e45df66ee7e1089d1469fe4",
    "signature": "0x0758258eb552216d2b5f727e3c38a09b6bd60460f9294d3a1dc3a280a5400eac205bbfe20e63f33b4e4d6959a43b3721283c888f3beca97cd9eefdfbf51fe1221b",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}