{
  "manageEntity": {
    "action": "Save",
    "entityId": "702379750",
    "entityType": "Track",
    "nonce": "0xd5348dd7ff9a07ec013847228d46a50f48d562d0c631eb8350ab0937db809da0",
    "signature": "0x39d29682f83559dd255ccba6cfdf94775aaaf58bb93fc04f3a7324712ed82b5812c5b79ae32fad286a6f94082b49c7ca6b257c01e92ffd92d05b365da96afeb41b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}