{
  "manageEntity": {
    "action": "Save",
    "entityId": "252576",
    "entityType": "Track",
    "nonce": "0x03bbca772f4085085d7b658c3d3a8b46a556bc10515d0d2e7e03fd4f516b8157",
    "signature": "0xb23ac9a2caadbb4b7bf1d833f8442d8353075897cc72eaf92690b90d39242bcb3c750ac7cd7a63a181128be35857574abf13a2bf167f9cdc0d459ee6e3488db91c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}