{
  "manageEntity": {
    "action": "Save",
    "entityId": "1987737829",
    "entityType": "Track",
    "nonce": "0x90b598b257a9cbea19b8c7c9c4df6a1adfb30bf74ae285a4b66c24f504e2603d",
    "signature": "0x6ae74ae4cd5302fb1c7efa196fdcaf6004845f2a47fa683f5815855b27d88af55c96e614c6e0bb2df2d6c6bba65c98a7db22621dc9cbda971099b4ca16b398731c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}