{
  "manageEntity": {
    "action": "Save",
    "entityId": "953879",
    "entityType": "Track",
    "nonce": "0x2ae0fd46f78d44eeeb7ef40319736d8516cdc592f5bdfd81a481b52905147588",
    "signature": "0xa510a1b393200ea48ee4ed8376a1d9bfc290f0fdbf54a2394810450300b57ff0097878c8994e7c12ca960804a0b01ac8c6762bc7a27b24cec1e4430024665a091c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}