{
  "manageEntity": {
    "action": "Save",
    "entityId": "2019079165",
    "entityType": "Track",
    "nonce": "0x7b09742c878e61dff0857cfc07f90f1a37ddda1c0b51b4b4d0f4b28f6340cb16",
    "signature": "0xb8c98d69c939af2ff3d510787de6993e1f97cdeac4d8f4e49ff2d7d3b238207a3504cc7a1a1f3f1fbc10585781dd4b08b3fd26b6496b4aabd3497278637684151b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}