{
  "manageEntity": {
    "action": "Save",
    "entityId": "165293",
    "entityType": "Track",
    "nonce": "0xa1fb59b8432792435ecb80e21f6f1be9475ba40fb5dc1a19e224f41a1a87577a",
    "signature": "0xe44a55a3af4cd0809b6cc8d4d624074bc64e70af3446b55bbead5acfdb81083410cea4913ba71ce974f682e806a3f023e432fdeed9df99654557a8a83e139aa61c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}