{
  "manageEntity": {
    "action": "Save",
    "entityId": "1661232300",
    "entityType": "Track",
    "nonce": "0xbe0a4678dbac3efa97f4d7783b4be0bd34d8cdf14edbd102898d81f00b43f4c8",
    "signature": "0x12d037ee6dd939ae1bace4b13a2806e31e6c0c692967db9ce0d2b9622d354ffd78b356c7a2183a04aa154626fc92375b5250bab19bb8fba1dff3ecc1524b26221c",
    "signer": "0x85D7989dfD9D413A720848AdED0Db82fa10EE3A6",
    "userId": "170120659"
  }
}