{
  "manageEntity": {
    "action": "Save",
    "entityId": "481854298",
    "entityType": "Track",
    "nonce": "0x59243c65a64293257572e332dc29b6d98030f29535f2b2ae5e245e654e306280",
    "signature": "0x9586c0a7a79cee17aa30704e14e343c2d20002ad335b9ccbf30ae66f3328e55078fec942aabb6115948fe21213151c3abb7a55bc5385368481696dd476f162e01c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}