{
  "manageEntity": {
    "action": "Save",
    "entityId": "1719645750",
    "entityType": "Track",
    "nonce": "0x39b059e6a18eec87fa3d8ceb708a95c89ab14f5cde8a8abe89c7e239c68a980a",
    "signature": "0x36191641821d3c37a6cc0d41b1e6e729993e54af4ec6c0e9f3abc5c169d8d0ca64a8a40f8b4badb460c2c2ef3ef3f0d1c8b87573f242a586c8b7746e4b0be9341c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}