{
  "manageEntity": {
    "action": "Save",
    "entityId": "1174761337",
    "entityType": "Track",
    "nonce": "0xe1917d02082206328461b8481239d9c16855eb2960bea1b0cfcc007c974b57ba",
    "signature": "0x693dad6f16d2b6a21be15eb7f46d6a2cb960ef0ed8006ab1cbfefb98735653f84c5b21a7612cf74a856a04cb79205a5154d10267dbb3d0a3c6b7495012b4d6711b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}