{
  "manageEntity": {
    "action": "Save",
    "entityId": "361158769",
    "entityType": "Track",
    "nonce": "0xbf99d3eb6893a5e84b69f12e3667dd28cff45e8a188455536bc7e250b52c60e1",
    "signature": "0x510ea125b926d961230db2d409a4a43476034e6bbf38cda9d0a55280cf93f35905922a8e45801e74a352b4b01193cfaa011638544eb69635a5f59414d4532e2d1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}