{
  "manageEntity": {
    "action": "Save",
    "entityId": "798474905",
    "entityType": "Track",
    "nonce": "0xdcc16717bb17c4072bd06faac957d2e448ed5ca262c97816ebcb981b55401de9",
    "signature": "0x21cd067429ec00a887e73db258e99384a9d7e33e66d4d241c6bbf194b73659213965f9a974060cd2a46360dff81dba505a70c7daa471ad824d746c705b5a31de1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}