{
  "manageEntity": {
    "action": "Save",
    "entityId": "2027909137",
    "entityType": "Track",
    "nonce": "0x3f37099f6c3e78bdedcaa0ee675ac5cb3aed8589b26f70c1784f2dd5ddf1bfaa",
    "signature": "0x8313c9f61fa772c5fb6ad340a6867804f242ad9c065f4ef2041d2decd6b8800611615d357c84ec0e6258e3ca86696d1539340de70993a4d7fef353d1e80ad1f01b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}