{
  "manageEntity": {
    "action": "Save",
    "entityId": "1623286887",
    "entityType": "Track",
    "nonce": "0x89d4e559dfa1f939a00131bd916ca8af64cf2a7d2298e54d7abd739b670e7c71",
    "signature": "0x5882f4dfaf2e5386734e71c2c454fd5e3789dd43a0a23b951b6b34d965a528d95b0e92f89647c052054e3114fb731da913b9b0030efd334a72ed56c8e7df968e1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}