{
  "manageEntity": {
    "action": "Save",
    "entityId": "1202959058",
    "entityType": "Track",
    "nonce": "0x0b92f54645e896c2a3aa51a6ec02b53375acd38c0ef03864a8bee0c51384f869",
    "signature": "0x014a1500f8eedf05e5b0053459354ce2c5d3e6c2a72d1640766380d0f9984c813300b720f4ad1d2e5c7bb535ef46984b031c29f1f03c9b54173af2263e200ae91c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}