{
  "manageEntity": {
    "action": "Save",
    "entityId": "332176551",
    "entityType": "Track",
    "nonce": "0xea01e90e30fd0ad004624534e4b90c9d46ae3bb0f95bd97eda7ef53ff2e78dba",
    "signature": "0xc855629f8e306b6df0648056062e8435a80645bdc978a4dcfa2ad2a284923d6a3a3d43758892686f89a5911ee6779ca5bfc4317db1611782d687da08a16f8c441b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}