{
  "manageEntity": {
    "action": "Save",
    "entityId": "994027721",
    "entityType": "Track",
    "nonce": "0xa290f21256cdc6bfac6f7d88b13880b6ba5111f6f50c7107ee89cdd4473b2428",
    "signature": "0x1ccb93cdadd29f549d4752ad29614d67bb3e103d575fcbe052e870558ab8a6a40e11d9acb2040bf18336c1bd75eaeef129fbcf74c99a123699559b9620ff29811c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}