{
  "manageEntity": {
    "action": "Save",
    "entityId": "1458215801",
    "entityType": "Track",
    "nonce": "0x296dbcc12080938514ee27001de4419be37f69fe852fa0f7c1bb26eaca3161ba",
    "signature": "0x6be4bd6f304698cf436fb6015c91671d0b6439e0211d5e54130994013b500ca03bc01f345e2de7d5f52789ab7075d61df278e635c83c4619fdb8776e0b569c5d1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}