{
  "manageEntity": {
    "action": "Save",
    "entityId": "572011138",
    "entityType": "Track",
    "nonce": "1785483753744105238",
    "signature": "0x99e5d277196135372da3cad10f28a27c1e24ee10560169193802aeb9d44b3ccb4dbf5acbd330861c908057d5431ecce9e2920d591b37aa436d3e465d652d91141b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}