{
  "manageEntity": {
    "action": "Save",
    "entityId": "126868102",
    "entityType": "Track",
    "nonce": "0x552d42d230612f3dcad38c13610c4c3753030cdda922f909f322db3653f3022b",
    "signature": "0xc16cb892baba4502a43bf38a1c6700144296855462f0c5785b45385894c9708161c044ccfa81c0a8349918f150bafde221184fa2ce4091a6e857cb43fc0fb7cf1b",
    "signer": "0x591E8b46f0D8b7a1FeD63222b6e5E3EaBe2900F6",
    "userId": "877370116"
  }
}