{
  "manageEntity": {
    "action": "Save",
    "entityId": "1150893648",
    "entityType": "Track",
    "nonce": "0xbdf0846813427362fd6b702893e6d929672683f91256bfe67a72ece054f8ddf6",
    "signature": "0xfe4acf649370ffaf60a11bdd43853d99ea539ee6d0377e0cd2f10158aa8e59b7279648e2799a75e8ba796edfbca618ec00618104f179fd134ed07512d690fb6b1c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}