{
  "manageEntity": {
    "action": "Save",
    "entityId": "982657698",
    "entityType": "Track",
    "nonce": "0xebd71e4d2ef6d108a1b2a936c433efdf7c7ce5487a2ea1aeaafed0cbdddbe5a7",
    "signature": "0x4116050dd007de039c0986af666df09d72ff77b52fb0bc92f786e26a0bc34e085a39a51ddf33b4e718803ab837e76b77560c569cf27d39e2f589ee246bc1c2421b",
    "signer": "0x19EDB4c1a8740c323f6e57B80F3422C01875289e",
    "userId": "390804"
  }
}