{
  "manageEntity": {
    "action": "Save",
    "entityId": "707690053",
    "entityType": "Track",
    "nonce": "0x8aecd3fa282db2a423659027dc8b320bd4e727b542f4a6ff845679bdb454c36f",
    "signature": "0x2ad1e731eacfb96ec875085c42273c0ceee7e54f172ba7c48798c4d1b880afd80c10dc8f34c5eeada3e122ce50974e2e2e3fa7b177dc1bd4f3225b4671e4db011c",
    "signer": "0x3324C23609BC25902C39CFa38CF40581c7Bc7F87",
    "userId": "229134011"
  }
}