{
  "manageEntity": {
    "action": "Save",
    "entityId": "1508116473",
    "entityType": "Track",
    "nonce": "0xbe46f28f6a455f0732e7489a49e3b20a5d9ed7d1a94d0a8d9f7c9f87cdf17290",
    "signature": "0x2c0971ec0a0b76a339a2fab97150fc91a27fb942b9cb905355c1ed9d654ec67638e2da679253f70197bb6d542a64d5abe21f359fa008dd922c139102e4abf0aa1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}