{
  "manageEntity": {
    "action": "Save",
    "entityId": "474793167",
    "entityType": "Track",
    "nonce": "0x94471003ab216eb013fcb2841830fabdf111e3c47764a33dfb0e876c9f3a63f4",
    "signature": "0x9861090cee6ba6891d4f684815bc5842bd4762e604617adb1a3072881bd0b4c555d15858d120f2d8961fad448fb2884cd258fcf4dded0f7a672d514d4af61b3c1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}