{
  "manageEntity": {
    "action": "Save",
    "entityId": "541435395",
    "entityType": "Track",
    "nonce": "0xa783d1204bab9119bd90872429c368ee70befe4ca6e6813a0ee19f2f5762d5a5",
    "signature": "0x6511db86b253e27ce84ff1436ffaf3df7e7adce2f39c6d35f795b4d07fb9d8d61faa0a4d15371b0d08affe909a21365edd4a57bc3e5d42cbc13cb7a8bc58084d1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}