{
  "manageEntity": {
    "action": "Save",
    "entityId": "544329997",
    "entityType": "Track",
    "nonce": "0xd8524e47bb8b1393e942a5c1c75119ed251de14744d5b1ef636eb71d45d85f6d",
    "signature": "0xab8160ebde5aa8f665a8a20cdbeb65b3c68b6dcffe348f9ff0e4015f656d4aef3113f26642bd7a87366afaa1de204301b39d08c12972f60fd98c247380203dd21c",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}