{
  "manageEntity": {
    "action": "Save",
    "entityId": "771854544",
    "entityType": "Track",
    "nonce": "0xf3756ba573fcd4246367025512aa9945e74699c7f7270392254c8d1777e4f558",
    "signature": "0x25146f66c408fe19cf383cdfa9fedd76e35d73c4d6d9adbc333418b09e73d8f863f7b2150b0bdae3d8456ca56d1c28697827db57d68c3fa2c9d4a7aed881f75f1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}