{
  "manageEntity": {
    "action": "Save",
    "entityId": "1429916571",
    "entityType": "Track",
    "nonce": "1786560555086062510",
    "signature": "0x5d6e1ff84af7b256b6b739a38487c623dd73e9010a54b07ec717197d7194315e31d3d1cf4ddcc1a10f51c3febe16bc1561e3ba8b3c972807e319f298ca59129b1b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}