{
  "manageEntity": {
    "action": "Save",
    "entityId": "1588116217",
    "entityType": "Track",
    "nonce": "0xcaf7a26d8623dc34234b6ec06a9596f271bff218ac5002b1afeac5f665cd22ac",
    "signature": "0xc7b89e93780edcbb8c8f15bc7d15f3fed426aebf91d02e8b1082c55d34343b834276a81727829cc0470b99638bd512755ad06af4a662e3d1e948dbaed7cbf6ef1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}