{
  "manageEntity": {
    "action": "Save",
    "entityId": "1116779",
    "entityType": "Track",
    "nonce": "0x08865627fc2699de70a2526f5bf58d0957710b31f965d020d81f8161201670af",
    "signature": "0x17731c435055722f3c562db9956a36565e7b84727d14dfbad2d9ffab8d976c1f799ffb4558c4f7b2df2482531a5d35af5800d12db83d276e32863e3eb9003d661c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}