{
  "manageEntity": {
    "action": "Save",
    "entityId": "835644090",
    "entityType": "Track",
    "nonce": "0x4d9466721183d7c93643bb3b7b25161fab3b891dbc3c49d9a343ff3e4e4efbb4",
    "signature": "0x1871eb06c98c46476a12a95c5570aff934ee90f89a3dcfd8f015f009a8f9f09b230bca9e7a07e6ff51f0372f38f96ebe9a74c79ad3d63f565ed77ecc31d17f2b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}