{
  "manageEntity": {
    "action": "Save",
    "entityId": "727209260",
    "entityType": "Track",
    "nonce": "0x376fb28e03375a8defd5fbd0ab5fcd9c407f23bf07560ea15256b44dd5876060",
    "signature": "0x934bbbb610c93502330c6ed4ff0b736c21124d32de5ab09df613cf68d98da90410ac7594ba4501e1160675dd5f4323df9ae6bb7e289bf0ba5ce99858fa5952841b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}