{
  "manageEntity": {
    "action": "Save",
    "entityId": "1996150227",
    "entityType": "Track",
    "nonce": "0x03d70bcc78116b935ad8bc09abedfb5abed748881a9479b243079532cdcc6f51",
    "signature": "0xa4471429776eddfd7ebbec81080f11b66e6f07dc171baa419a25a7097fc9db185676bbb4be87a0116b50c00a60b10864e80457bc265bd116d5dde4204531e5221b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}