{
  "manageEntity": {
    "action": "Save",
    "entityId": "1148847381",
    "entityType": "Track",
    "nonce": "0xc170cde0db31dab1f5e30841061f6b5360caac82e3047a4c48cb676560b169ba",
    "signature": "0xe0cc0e4fa27b03c7cb9262d4de4c92f9e7032d62eaf09a0cbe484aca649c51cb5d8cc47619661eb53384d9b6503dc15597b17ced5bfef0a34dcb5a3c85fd27411b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}