{
  "manageEntity": {
    "action": "Save",
    "entityId": "2147413107",
    "entityType": "Track",
    "nonce": "0x244e218d736f7b84491bbc96327855b7299dc58705a186c8df9a5cfdaef56310",
    "signature": "0x5feaed4283e07782b9022045031e1dd65123217c88a8a0b6ceff5cedeb15251f6ca0b1ac9e1b8bac09e66419bcd06aa36f4f11756c3d88b30dc5e500861b03be1c",
    "signer": "0x658704f5E9496548E3179a01fe1F54ac2a0b77a4",
    "userId": "188933"
  }
}