{
  "manageEntity": {
    "action": "Save",
    "entityId": "663367010",
    "entityType": "Track",
    "nonce": "0x016a50d81bfb7ef48a715f77659001f299b58bb9ae8d5c7c9795f78ed91dc369",
    "signature": "0x2124120a8bccdc0a6e1cf8e65b554248f74ef37e6dbab361ab16969f0a8850ab0b2df049b1bee3a874fad0942ce54959dda0c626a2d72aa8f86bff31dd0ffa161c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}