{
  "manageEntity": {
    "action": "Save",
    "entityId": "1533458699",
    "entityType": "Track",
    "nonce": "0x95a89ad07a725e56eb3bd53b0aafeb70279c853e1efdf11815f85e25f835559f",
    "signature": "0xa57fdee483f64d4b44f45650b380c4d0d631615cd913cf62e1b6939600a7b4fd18ae9c7a0614cbc50c45c1005d12158781f96bfcda6418088201b4d3b7f406661c",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}