{
  "manageEntity": {
    "action": "Save",
    "entityId": "196918",
    "entityType": "Track",
    "nonce": "0xcdb1f503edab985d17a6ff44e2535b1b4b4cbbed0b83cf28166a0725a38a0582",
    "signature": "0x4a027fd22a24bd4b22d315e51e274373dc0c6f25bb57f95a7efad0591cdfe2200440c070b0fed015987f0e4fa9986ce67f4b20afd1e762cd0457959ad81f5fe91c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}