{
  "manageEntity": {
    "action": "Save",
    "entityId": "652815226",
    "entityType": "Track",
    "nonce": "0x587e1ca60b17f1172ea144d291d5072525b6d5f5d8e4539087be8a48b20d5186",
    "signature": "0xe3af905eab17c4f7e00509bdfec7e19e5d81cdca5f10839a5b4df686605b5d492b616c7f02851ba8b5bf4701f1a6ff17ec5ff9cb46ca7f9286f973d3fc22c1e31c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}