{
  "manageEntity": {
    "action": "Save",
    "entityId": "1250230433",
    "entityType": "Track",
    "nonce": "0x7777fac1cf7a5bb5a7e16c33980a821aea41492adbb08bc330b6231d100a0aba",
    "signature": "0x8daf2625616cb4b7499aa4240a6e03eb4d35f7aa0ebe95998668cd15874a6e86791b8f06a8fc9ef365ae467f26c94df335dd571aa8f5dd4116bcc975a1169d3e1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}