{
  "manageEntity": {
    "action": "Save",
    "entityId": "894684753",
    "entityType": "Track",
    "nonce": "0x7770fe774c292e6148cd3405d06e4122d3701c007964e7c1015458df34df0cee",
    "signature": "0xdd4fc6a20b467723669f76beb43b1f66c38a2eda34801c105c96d124bdc8e20576bb80eef2886a722cf7bb23f5c5b318c56713ef9a8cc4408c53648201f46bcf1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}