{
  "manageEntity": {
    "action": "Save",
    "entityId": "1635448293",
    "entityType": "Track",
    "nonce": "0x347d3777d0ebfff2d8d954ad259f18f41e15c0b472dd23d3875a29a4845dad90",
    "signature": "0x6e32bb16ff7a232dc9fa73491691bc264452761078c215245a2a929d5e1202e91a768a8927cc94d5a6d20d4246d0d4f116c23930ded5ea524a06c8abf11bfb151b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}