{
  "manageEntity": {
    "action": "Create",
    "entityId": "732968229",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"Nice tune\",\"entity_id\":825059890,\"track_timestamp_s\":22}}",
    "nonce": "0x054d54a3338f6d10b1ac699097f22ba6e9d60f7d189d450af31530f90d3dcb38",
    "signature": "0x92efa90fa60956ebe574a28182669e9ce1f2a1e2cae379c191c3847bf267cc6a52f719d2c4813c74d8e8c0d0ef06994aa5baac07989411a51ee21645c559bbba1b",
    "signer": "0x9976A5bDB93F69653188778fe013ed45ca0c2Ab1",
    "userId": "85051708"
  }
}