{
  "manageEntity": {
    "action": "Save",
    "entityId": "1077741",
    "entityType": "Track",
    "nonce": "0xab5f2a42bbd66ef0124ba1cdc7a70016aade7d59218181570f301660a4df5b85",
    "signature": "0x7d9c6d160d89bf7d4154677d7cab7c8abf3cdd9b0d4ff51a51933104cbced23344a67d64e1b6b9da81bc271a5cdc440135d28bf4c09b879bfe1950d6b7d7d2ef1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}