{
  "manageEntity": {
    "action": "Save",
    "entityId": "1930097799",
    "entityType": "Track",
    "nonce": "0x186b03b98bb3c76435bf802b42d2c375ea764533401dcdfd72400419c5f9f0fd",
    "signature": "0x561fe42c8c1ec99f7c9679f36c31ac4f6602c88a2efa8743333f5116273941145530ad37de47d44de0a7a48afd0666c5ffe155086cac49aeb86a2a480effbea81c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}