{
  "manageEntity": {
    "action": "Save",
    "entityId": "496689",
    "entityType": "Track",
    "nonce": "0xca78d318b6fd54926f805976c08ce4b3560b504f6593f81d445b0058aa4c23ab",
    "signature": "0x0376c8e9d469e3857045d809377e85e75203f19a65bc42e1396ae81781782f7c543c12644f4e8a174d3831f8fcaf5c94bca5af5dd7cdf13429889cd7e382c5771c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}