{
  "manageEntity": {
    "action": "Save",
    "entityId": "294023094",
    "entityType": "Track",
    "nonce": "0x446d7cec0c1524585e7119cbfa83fcd08f5078217800fcc726b1719415c5f0a5",
    "signature": "0x7cd462df08d2023412a8fbe17dc70f384a911f121a43545820e285e7a245e2274beaf4f83ede7be8100c06658ca728d50a99ac4cd0c4f054d62f901813f2edda1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}