{
  "manageEntity": {
    "action": "Save",
    "entityId": "1721446865",
    "entityType": "Track",
    "nonce": "0x97415707a69a07ff90292b46494411990ac5e6b137793ab8733ac4e861b00c4c",
    "signature": "0x339010924ebafd16669441d2b5bbdf62f23d20e4571726f1d4894f7c9aac4caf41bd90067d8fe54269d8113c3a417181f040c210892dcfd1ce16e3b6d495942d1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}