{
  "manageEntity": {
    "action": "Save",
    "entityId": "1329421743",
    "entityType": "Track",
    "nonce": "0x7155ad07229b36c8fa548a782fd1fafc08b0550356ed76ffdcc3ec23657a6514",
    "signature": "0xc6cb1297ec591ae8d3e74f9c52a43b949ab41e797ab1543c6bba9c47fb17f06373d2acb0b51d818a4c4ab10066b73a3df0b31a79767626e0250cb3c83b6659bf1b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}