{
  "manageEntity": {
    "action": "Save",
    "entityId": "2016600069",
    "entityType": "Track",
    "nonce": "0x0795c38103b18debdfb17d5b2fbe4fc2f2252267f0e1a57b60b710fdde2070df",
    "signature": "0x21043b89ea3f291d05913fc3bf021f123f83353d134a3414dfada21ec6ab1cca003f2b8818c2ce776fb26a610f2617ee510ea12b4195bbeb171aa52720cdfd541c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}