{
  "manageEntity": {
    "action": "Save",
    "entityId": "1359650504",
    "entityType": "Track",
    "nonce": "0x980b45a30c2faff89928989a424bd9f18f518e308f7ed2fab6aa3cafce507503",
    "signature": "0xc9d47ece4b12adeb46a4d1a36d3a82f8ea594bb36471237948688d894edc632d57235de663de403ce1f75a898bd352c4c243f78f947e2cb4d7ebde76fe3535331c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}