{
  "manageEntity": {
    "action": "Save",
    "entityId": "1210033479",
    "entityType": "Track",
    "nonce": "0x5e7a51e29b25eba6cfb5303f5a0104af577156c10fbdb047a4cfda87d1323f01",
    "signature": "0x30dbb65d5c5c8e0b2abaa31dfe8cca90326b43c351a1468c10c9b58a4d73a87b62234848751d736b568cb0447f48cc6f242367344098cf33248ec4795057d15d1c",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}