{
  "manageEntity": {
    "action": "Save",
    "entityId": "947691011",
    "entityType": "Track",
    "nonce": "0x6df20c4174051ec914564a332ae4912010b5c5d7b6ac8be895d2fc42a20358ef",
    "signature": "0x14cc6987ddd6050df35c176603c08061085ee493c79b975731d6475e8d50c06419c4ff9581963fc272f79a591a5e3f44c602d3c3399642e6b7064172a9f908bd1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}