{
  "manageEntity": {
    "action": "Save",
    "entityId": "857227142",
    "entityType": "Track",
    "nonce": "0x7f7e19c04098c06bf500a6343d629c9246a6f6a0c50098be95b43e4f33769ef1",
    "signature": "0xafc783d1452d31e32d459fe124941897996ad0bf1ff65c1622e2a57306a256695f18c0b6b83e8d7d3d421182b8900e952e29af4aae3714ffa0e7986dfceb82f01b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}