{
  "manageEntity": {
    "action": "Save",
    "entityId": "120477",
    "entityType": "Track",
    "nonce": "0xecac47e535f027518f8046cb1d96db3587cb6f7554b3a464316618b19a82687c",
    "signature": "0x1a2a0cb96b754413cfdc9ddc78d89e334d027a473f84969dae151fa44a042e1658ebd25935481ab3c9ebf5d300c044c4e8c0c75a101c4ef93ff26a25ea69346b1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}