{
  "manageEntity": {
    "action": "Save",
    "entityId": "384035104",
    "entityType": "Track",
    "nonce": "0xfb518dbdf39d679a13a786374fd36e67a8eeb951ad2098efd758f3f06b2242ae",
    "signature": "0x690f293aa8a5495d7043aa6323e64f19e6ed32eb2db337658eed4c9c90558c003ea16950a2a09ab75403f292844c1c00550304255ad3e6e78a565a3b71bda7d21b",
    "signer": "0xA59019D8b271B1fC56c696FAB98A82581d424Db5",
    "userId": "46085"
  }
}