{
  "manageEntity": {
    "action": "Save",
    "entityId": "552952",
    "entityType": "Track",
    "nonce": "0x5481a3c9983cd64bcaad784d8b217d04ed8156542c8a6b2a079a484930f2b371",
    "signature": "0x95bef01e7108123f1704dc6ce224a287e90c07df3b83916097a1dcec5d341299714c82209361cd6ecca4370ef1ef4fdefbcba08a417cc050c790bd74aa57f84d1c",
    "signer": "0xaF260D56498a2d61b204aBc5CAdCbEc98465d11b",
    "userId": "219894195"
  }
}