{
  "manageEntity": {
    "action": "Save",
    "entityId": "109046258",
    "entityType": "Track",
    "nonce": "0xf4e7e66ae62039a641eebc71c4fc8fd31ce47fc4719fee0fc265e111cb4e8246",
    "signature": "0xe896413abe3d31ee4fb25c8ba3799c6524c4808b30a20f09e8d053786c9ab4356f228374433ab9cd7f8ec9398d8b481e6f5e7a5df2765d2e55fd1daa458f47791b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}