{
  "manageEntity": {
    "action": "Save",
    "entityId": "207622",
    "entityType": "Track",
    "nonce": "0x288d875baef17632e2b86fdbfa3db3997b5fba78a965bd5c6c6eba8cdc372a67",
    "signature": "0xe15b5dabd93037383b7ae8dee7da1cb2adb48f7e08020c5eec8b51bcda1a0f8e054a13b047ac49a6609f4d1d91fa3956d1a3fa55ef7fd159a386d9c4da3fa0c31b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}