{
  "manageEntity": {
    "action": "Save",
    "entityId": "2117258144",
    "entityType": "Track",
    "nonce": "0xd5af9569d180f3888528f77f8f2f91a19ea64d80cd0d8a06cd29b90886554891",
    "signature": "0xfd5d7a0cb7bbfeec1e9434c71d91e925752dd6599b4ca69170794233e14e954152d84b8a1de9ebc2f49cb2713d0410e8a7b6d54acc7d1afe5703d8cc5539d31c1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}