{
  "manageEntity": {
    "action": "Save",
    "entityId": "1855317597",
    "entityType": "Track",
    "nonce": "0x7bdf32157d8b536a3cbaff147b573727ea596a0c757c4ab802692b5dcd3af357",
    "signature": "0x4aa1329c35b2ca88de9c0cf12cf9b294a8ffb666265ec88871db63a545156e8f74142db66220258efeb5e0270f48592a45968bb2d305f82ebaa9de8d07ab42941b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}