{
  "manageEntity": {
    "action": "Save",
    "entityId": "146719",
    "entityType": "Track",
    "nonce": "0x3adb3228beb6b9aee9e7e4f93ac1ee1d10cd483362b61d94d8873141d2b483ca",
    "signature": "0x6df58fb910be9aa080b75980a4f2442c637bad6ba31ebf43d727dc9d7fbe1d2b18f545e9e95dca30dd7de77f57425ae7764d266034bc12a498c8d60a34157d591c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}