{
  "manageEntity": {
    "action": "Save",
    "entityId": "1585456196",
    "entityType": "Track",
    "nonce": "0x30eee2298ed8822e5431b6aa138562b8e00b0c9996e7dc2443af28fc079acb1c",
    "signature": "0xc96298ab826d8ad817e1ca5d2370c51d4f9ab610f04fe9adff9969380561a7f9590f7003a228d435806cd4b820d1c4d5d030997309502019a58ba7c0982206971c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}