{
  "manageEntity": {
    "action": "Save",
    "entityId": "736869272",
    "entityType": "Track",
    "nonce": "0x1ad735a85c87e26e2f1ef9cf9cc7df296505d057bd2efe18f0c3ed5c6f7874e0",
    "signature": "0x2efc5f6a855a82e4d9b52278f1a883acc4485b44f2b9eef68cc3c7949c0c3a6d2d21323a059fd034bf2589a41e8f789ee8b6ee0ef7f4efbfd33045034b77803e1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}