{
  "manageEntity": {
    "action": "Save",
    "entityId": "1474633739",
    "entityType": "Track",
    "nonce": "0xcf9980c5e65b9e8d82f3e54f14aef03305d41d46f503645a4c3b5843deb4e835",
    "signature": "0xac6e5889297acc4874e10b7bc14985cebc0da982afdf480a4e5da4156b0f33bc2b822567b62266377365316ae222a7e70b9ea91f4422efb27c7650e431fe44861b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}