{
  "manageEntity": {
    "action": "Save",
    "entityId": "1124665752",
    "entityType": "Track",
    "nonce": "0x8047d2604d3e18d10625e24a5deb68b7c6a3844a8465d479bd921b1838c6e203",
    "signature": "0xc766c76704d321d941a0ff58c629291a86806345d2563dd60ceb5fdff4b8bb5f4a13b528449ceb71059acf3c93b9a223d9f0f3923ed9309e09478006dc5ded001c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}