{
  "manageEntity": {
    "action": "Save",
    "entityId": "40976229",
    "entityType": "Track",
    "nonce": "0x8a116824cdb033fda27ef684c482138c3c5591087a55a9e9763a7ab295ea572d",
    "signature": "0x892a3ae1cfb6a51ed5422923f57964f2092dd1f0a8154d8a5063ab98a6dcf6683cbb4104ebf31d4e83ceaa434a478ecce39bdae06d56a5ed6c2cc18850f685221c",
    "signer": "0x4810fE66B3A42DA4cb34b622aD9A069C293c6b86",
    "userId": "445042807"
  }
}