{
  "manageEntity": {
    "action": "Save",
    "entityId": "400034",
    "entityType": "Track",
    "nonce": "0xb33df03052cf416d3912f5cef485a848cd44b832fd46662683feef2e27ed9b2f",
    "signature": "0x905f3f40d3550bc9aaa9c6d2d84cafdb87b04f897b8ef16c30eccc0cbb70316f595253407de234c4a85501e8820fca07eeaa23d98d307aba671148360d41a6cd1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}