{
  "manageEntity": {
    "action": "Save",
    "entityId": "239876339",
    "entityType": "Track",
    "nonce": "0x1144a5663d6579f851af288860486cfa1a601231e8194244449bc9ccc99d68c9",
    "signature": "0x0a2f024b030fbab867bb86d5b2bb44c8a33c78e47734fbaa2fb618da19b8a5d47417b3c744c5437325354588d6b577701791fc004f34af3c9b9b6528fe5dc8d01b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}