{
  "manageEntity": {
    "action": "Save",
    "entityId": "76360",
    "entityType": "Track",
    "nonce": "0x33581e23f470f6b6fc755bf02e82019ce6664d50be63b902b52bdf1a6b82527d",
    "signature": "0x491efa3432bff648a9896b2faa2cdc5531f0b8dbf964f7b98e5355b08d3020144393cc704b8ca95d8a366a56261e606c4045a0923c9cdc48ee47903568a147951c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}