{
  "manageEntity": {
    "action": "Save",
    "entityId": "1245943201",
    "entityType": "Track",
    "nonce": "0xe71e5121f1e0b5ec633c0b711c654109e540d892fca7981d6770e775ee025afc",
    "signature": "0x384562540a1d5721b4bc6f1c8c4dc4fe74a18adfebaa7c58dcaf2785111cff046c69343b8fda8eff7e30a81d680490ba62442a5cbd8938514a4379906bc43a6e1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}