{
  "manageEntity": {
    "action": "Save",
    "entityId": "90693394",
    "entityType": "Track",
    "nonce": "0xeee51d419c24aefe7015448eddcac3512bc235db50cce3b57f9af3540ca319d3",
    "signature": "0x5df5ca9de296f09921ed06cf79372fadf63a80304ae374f4ab5b9a232698b6176edd316a179b96789a290e0f39c6f6802cdf376517c9318ac08820da050c20c81b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}