{
  "manageEntity": {
    "action": "Save",
    "entityId": "1623478666",
    "entityType": "Track",
    "nonce": "0xe7bea6108788e08a212ea31daeb4c21ad9ff009ed8c4e8281bfc93c5bacd42b4",
    "signature": "0xc29cfcbfd3b11f06721707d28b94dc0d9128ff3f99c65900782c303b547c08c078d8f43ef8f6af158192118a00cc67bf3b320362a6737bcae4e857f311cb54281b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}