{
  "manageEntity": {
    "action": "Save",
    "entityId": "78333",
    "entityType": "Track",
    "nonce": "0x6b2252cf87e045673b260e85d628c6badd04ca20dab674bbec284e994d8f8e8e",
    "signature": "0xe203ded5c3357ced162a11bd73c1697a0eb1ec8f7fef6382fed56a97230f498037e878c648601ee4ee53843ba991af65c06f06642d39514307b81bef63b4844d1b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}