{
  "manageEntity": {
    "action": "Save",
    "entityId": "1322840173",
    "entityType": "Track",
    "nonce": "0x7f99913cd88dc73d000d8ae744b8adc764593fa4ba847765463e9248ca6d7a9a",
    "signature": "0xf50037dae96a18db92b0006216e27b0048498fa9a3fb2a7475254744ad7a59103da228014f557ec185b046b1a8494ccb25398c8ddbb21736273d3b6c9477bbef1b",
    "signer": "0xf954E35976C0aAaEC2968197F2a371Cc99E7C81A",
    "userId": "102143"
  }
}