{
  "manageEntity": {
    "action": "Save",
    "entityId": "708802",
    "entityType": "Track",
    "nonce": "0xd6f11f10b27e97c005acf3e700a9920918b010ab3b5ca0f55826cc495cc1b7a7",
    "signature": "0xec630d2197660097f8c6c356e75bd996286c404957bc21a1877a6c571175c9987eb7b7e658bb5a49988ba06f26d8809bf4200d94c2d49036930e17555e1d38551c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}