{
  "manageEntity": {
    "action": "Save",
    "entityId": "962712",
    "entityType": "Track",
    "nonce": "0x5e445d7400e0d63b55b26fa2ab2ef51ae08ae51923aff6d83379a6c92864d7f5",
    "signature": "0x3f61d7b463ee5eed663537e96bd0817da2de7faa1131f42750e120a40c9658e86692f899562a6121096929642084e51364f485e1f7b47382dc6cbd27ed8495d71b",
    "signer": "0xc77540EAD86038cb26A711997ed5e69ac02B364e",
    "userId": "790654170"
  }
}