{
  "manageEntity": {
    "action": "Save",
    "entityId": "1352506965",
    "entityType": "Track",
    "nonce": "0x0b7cc35ffcd82d83d30d565373d24f7359b023d42d8e2479647ba095ef02685e",
    "signature": "0x77bcb627eec31530dcf389324804eabe17efbdd952036fe883424c7540e53ed75e434b164d3dabe0d8cceb6f49351ee4244e2305f0bb0acfddf1034810e4faa11c",
    "signer": "0x92402981E40C3A78Ae6Ef776E98682cB9aAAa95f",
    "userId": "222"
  }
}