{
  "manageEntity": {
    "action": "Save",
    "entityId": "1806417382",
    "entityType": "Track",
    "nonce": "0x83c55807c56f4ba581383c185c89ab7f5adb41d17d3b9da53c410f896cdba692",
    "signature": "0x70c9b08d739352bdbee3db2d748a416cf594c477575f60ac2a67f7e7323a65555b0e4c03483d2944aded9c7999271eead928589a79623ca1daebce20e2cae1751b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}