{
  "manageEntity": {
    "action": "Save",
    "entityId": "248354224",
    "entityType": "Track",
    "nonce": "0x23f4d03aff96b70e5ea77b955e93d8c1931f8ce6d3ba49318176aee1d23592c0",
    "signature": "0x7faf5e6fb06872e0ee0708614677aa48777ecedbfa13635b50b2b63462893af3650c08bb67cf6ed4ea20ae9acee05266c87b06055237367f5725e391c45932db1c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}