{
  "manageEntity": {
    "action": "Save",
    "entityId": "125095",
    "entityType": "Track",
    "nonce": "0xaf7458b0a32e5e2f0eaa7511320b8eb14c7881fbd442e91cf021e97c2d206f4e",
    "signature": "0x76829d266eea5dab1e63a972b6e0f5e87342c05a53f3bcfe66056c911ca7d8e114c3f6c2bcba0aa9a5b6a39824af3d30e77a8f2da5d18f6f7bd9a9b3c100cc681b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}