{
  "manageEntity": {
    "action": "Save",
    "entityId": "1563155620",
    "entityType": "Track",
    "nonce": "0xcd383e703a0ad7cb768bf24f52f27bec6d4f3bc6b477c2bcb1c8c7f0ecfc4e25",
    "signature": "0xc278b19b7e291192ef33f3526e6c86f1e9e0ab0b0ed7f83c7bc3db48a37a3efd64dc496fd3db2a8fe642269eae45169a185c61eca13fc86b0953fe17f4f45b6c1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}