{
  "manageEntity": {
    "action": "Save",
    "entityId": "1028378771",
    "entityType": "Track",
    "nonce": "0xf3143263031d32c0963b51dff54632b6a6a3efb0d29a782d1eea7f3d94c442cc",
    "signature": "0x782dfdc743ecf47b5e2b2a7591a9c322018695a72c0d0db100c1d184652e85f0262f7d99b05c894f1b3e4fc6afb7ee088b5f895090d319719c9353a5726281901c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}