{
  "manageEntity": {
    "action": "Save",
    "entityId": "1914236808",
    "entityType": "Track",
    "nonce": "0x1d0f961750be3a2ee8d62a92f618dda7a979e063f9c0b893a10895f4cb92fa80",
    "signature": "0x0ca76846cb8688a9998179c4be633553256c9d4f294cef93459d5de76fd7aa6e0e2173db84ad6d1f657dfd067ac2419b8724557b278d4d01057012c1b5f1bb0f1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}