{
  "manageEntity": {
    "action": "Save",
    "entityId": "168092479",
    "entityType": "Track",
    "nonce": "0x5df6c0bb7f7ba16cc7fdbbe12fd07313103f935e6983a377938b241f5b101ec8",
    "signature": "0x56170ea9049a6134cccb65e9284493c22f7b98c967131c2f83441f58d91cc95703977a5edba628eca8d427c30c7089e3c49ce12d4cfcc0a05b31ce39af3850551c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}