{
  "manageEntity": {
    "action": "Save",
    "entityId": "2025415198",
    "entityType": "Track",
    "nonce": "0x573d84cadf1ed4b4c15b88d296903c06abbfe78bcf41d9edb90c61fcf9516170",
    "signature": "0x1564412a238584ffc95bbe7b18017033cdb711f591d9127884be16f9a8669d7466ef2712e910556f85fe88870b1e41969b0c683d8a444aa60a5d610fbdb9f5ba1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}