{
  "manageEntity": {
    "action": "Save",
    "entityId": "218175223",
    "entityType": "Track",
    "nonce": "0x6f420cabe4f7d88ffe17b433cf753ede0f3d18489db9a679bfacba98cabd9d0f",
    "signature": "0x9ed8564f260dda12cb7aae3a6828bf55f0f2e041fa8ba862aee5cfbf31509bdf3c8b36aed97ec71f2870f9c638734dfdddf791774b70948c00e2af3db724af441c",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}