{
  "manageEntity": {
    "action": "Save",
    "entityId": "1742687429",
    "entityType": "Track",
    "nonce": "0x89b58fdd26d1f7def2137d30ea25dd58815d76424b6de4cfe18c43fd735f1262",
    "signature": "0x4839e26060440119ff532f85eb32d4ed55e0308ba39d5d05d6cce9e8da1f3b0a1eaa0f78a755561319f6ba08eb2c5ce0b497edbf8540d5742e858935a8487d201c",
    "signer": "0x316933E449A0b429014E405447c447C9Bc472bE9",
    "userId": "451684863"
  }
}