{
  "manageEntity": {
    "action": "Save",
    "entityId": "562061657",
    "entityType": "Track",
    "nonce": "0x4a8e2502a91732b31a55cba9131584a4c1d4694277f98a590e7fa820e57d7253",
    "signature": "0xbff586833d2c4981b5097a17016158cd1f3421ea999e692b106610b571b0eb5052b4fe97ffa8901276838f003c51a459d0db8006284dffbf56566976cf4e04431b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}