{
  "manageEntity": {
    "action": "Save",
    "entityId": "1593826343",
    "entityType": "Track",
    "nonce": "0x660a28afeec3fff0b1dab52b28ebd35ca2c4c2454f87317ae6b3ff93744f0a82",
    "signature": "0x9bd55d1804063c409b2804363d090b52e927e434c3ec059176f9299583eb67c64c7afcbb09a66888a6dbc7dc1aedbca8de322deda6f888d68e92e8e9139e0c161c",
    "signer": "0xD06A00B950F1f08B348e3cEf0B75Da0010adF313",
    "userId": "238712"
  }
}