{
  "manageEntity": {
    "action": "Save",
    "entityId": "953462304",
    "entityType": "Track",
    "nonce": "0xc31167f8809e92ad1b8b603839bcc3ba682b210726c4242f35c4b43fe0bd0f0b",
    "signature": "0xb902e6d98ec5a421e031114a241ab7e30e5de8b312f89be0e4b21f5551778b960c7433f5f4741dfd851f3ff8ef67d71add998824c7e3fd53220c3381f603e82f1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}