{
  "manageEntity": {
    "action": "Save",
    "entityId": "333833",
    "entityType": "Track",
    "nonce": "0x7d5d6bdc54bad3116b67930e7cd92778d464e9faab7457d1a3874eb9b38b0711",
    "signature": "0x05978492a13450817dc98064ec9262f02fb4672c7d376a3db360270612fd34d24f7d7aeefb14b4c82a744cc4a15490ee26cb031a3fa77a54b352a93ccc0e81291b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}