{
  "manageEntity": {
    "action": "Save",
    "entityId": "1511721644",
    "entityType": "Track",
    "nonce": "0x835ace91b2a79f3e06c707c1d3e519d706ae0c4095d0ea302bc08f953d8d01eb",
    "signature": "0x188cfa683d1f3fbbb7307571554138d56445758258d7a1e7337b4f3a93b00d3566b553bfd0abdd464605eec10a0b87658a83e0d4552d7373926ad028cbedae291b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}