{
  "manageEntity": {
    "action": "Save",
    "entityId": "1119194940",
    "entityType": "Track",
    "nonce": "0x0e42d124d8a9f0d6d835e26e7fc7eb6f5fde63e8589cba12a5abde0a6eb286cf",
    "signature": "0x18c971d2d3e5ccf22b297658e599e870c6714531be92c4a8700a6bb4344130ec1b712f958747a7dbac2a11d94646a377058810faa326148423f2363295744d011b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}