{
  "manageEntity": {
    "action": "Save",
    "entityId": "1831958781",
    "entityType": "Track",
    "nonce": "0xa1c109567ff8b3ff33c8571ee9fbbe1b9540b11ec211afe57b210aa6d7e5ccf7",
    "signature": "0x798d6f55bd190356382cf6a99f43fc91172ac6659ac707c9bef13039aac1f4047912b9050842a570fb95c632ee456d713fe339265c326e5bb1254103e6f9b4c21b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}