{
  "manageEntity": {
    "action": "Save",
    "entityId": "506295",
    "entityType": "Track",
    "nonce": "0x83598e0b26cb24decf96ebd851c234ffdbf20292c7ed8d1f7285b746290f7ca0",
    "signature": "0xba89d6c4ea9d56c361d86c783df7e1d592bd66996a174f2846902b5920c2a4914324b787a5cfd65e9566e71ebafadd606c71db298854585d3806c5706c921a6e1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}