{
  "manageEntity": {
    "action": "Save",
    "entityId": "291633",
    "entityType": "Track",
    "nonce": "0xdfcf0bca019195f067e4af5df94163e4e881a4a8645bfe7e424bf2e034ba4ddf",
    "signature": "0x25b0a8ff672d673b269b058fdb30c6fd4aa249cc805490bcb0d9193bb87165812ff74262009f95d6c0eaa8454695ee4cf1bc47822048930e71542d33f53e4e331b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}