{
  "manageEntity": {
    "action": "Save",
    "entityId": "495613098",
    "entityType": "Track",
    "nonce": "0x39823bddc8e779f90bceac0546674c98dc9b1b23410bfe90baa53f7cad15509a",
    "signature": "0x18c85ad5eb01920439b34ac53757647bb4bbd41d488f5cf7ddd176749f1d913703c9c5776cfbb6673089ab1a97999bc94c57724f57c1b4150d3eb6b8de2d0ab71c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}