{
  "manageEntity": {
    "action": "Save",
    "entityId": "293399",
    "entityType": "Track",
    "nonce": "0x0b9ee73ca4669c92c76e567242c7ed8b6a3183e15913645078b9a84e41f35833",
    "signature": "0xca1acf05dd35d1e7b4b71410a233f99e0653573c6098ab5b383cc1cfca1f2397311dfe1a52524f21effcd1e8b495a33e57b3296e885a2348a682bf33da55eaaa1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}