{
  "manageEntity": {
    "action": "Save",
    "entityId": "1379682443",
    "entityType": "Track",
    "nonce": "0xce77e8896fa45aad0ffd63fbeed63fe93292aa97b7d4837b126f953b0c2095e2",
    "signature": "0x734c94dd979cd87029fe5a4e2a13ca82f87d5d9b38546b7964033824a60ab9c96e14db210582ab48d2c584fe38cbc84d48eb9a58ee00a7a3b31aab3c5ac248ce1c",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}