{
  "manageEntity": {
    "action": "Save",
    "entityId": "1663230485",
    "entityType": "Track",
    "nonce": "0x08d27eb5196fa71d52732ae99eff63ceb782cf36eb3b598d3d074132a2123836",
    "signature": "0xc494c8b2528b4674b11f8d4fba2942651d1fedc4585286aeff35accb65f883094112d7011fb932f69aecf6128ea007f0da7f0e861378b37a9ea421cb6132e4cd1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}