{
  "manageEntity": {
    "action": "Save",
    "entityId": "726821990",
    "entityType": "Track",
    "nonce": "0x99c063edd63b65890e1501b518572d93bdb96e66209aa39bf89d877253911bdf",
    "signature": "0xcc67d51b994aaeb30e8dd686edbcf6b334b6863314a1a4d28a3b4cde2d18fe100bbd0c3ffe499898ee069d62ef248697fa40bd20f63b62ad5c4885e1c50add031c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}