{
  "manageEntity": {
    "action": "Save",
    "entityId": "439563010",
    "entityType": "Track",
    "nonce": "0xa409f3cccdbc824e70e79028161009cda2b168d109058de9838444f02d4687a7",
    "signature": "0x6b879babfee26aa32f7c1b2d7186c00cf99695a4180d4e4bfa2bd8d60a50b88a457356eea0ac0937166fd0555fb535a200a97d9129f423e85c6bb94e682353961b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}