{
  "manageEntity": {
    "action": "Save",
    "entityId": "1496751372",
    "entityType": "Track",
    "nonce": "0x6c9ac4f48531e8c51cb744344a1adfb38c83eec284c36a1ecdf822f20aeddb04",
    "signature": "0xc993e9d5a6752f44d1c35eae0097fd666970755d94f9299754531fa9b5d9bf9438f49aee4adb0be3aa52b3a4317ec97ae21b9fb0e1f7d4ebb3bd923fc5aa319d1c",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}