{
  "manageEntity": {
    "action": "Create",
    "entityId": "2049168724",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"Fabulous!\",\"entity_id\":1548199388,\"track_timestamp_s\":67}}",
    "nonce": "0x78230b2c4e3eb5f2d463b551a3586f856c2b40dcaaba01632f6a80e0bb8d75a2",
    "signature": "0x45d60f774344334d670016963b0e435fb0bcb5946728def22df816b49a3f306c37174adbb0f9e585efefd123c4de6729d8e321e6be075c6734f4646a4d44ace01c",
    "signer": "0xD06A00B950F1f08B348e3cEf0B75Da0010adF313",
    "userId": "238712"
  }
}