{
  "manageEntity": {
    "action": "Save",
    "entityId": "1427638822",
    "entityType": "Track",
    "nonce": "0xaf0163b83d162d87dad280e740df86162f3c374df1b9ea9230765330abc5b138",
    "signature": "0xbaa37fbcb0e4d2066d222948999e180147e4d9e6aef0fea9e2ac3ea7fe1e60c621ef2a8793a73d9c70eae0c56849c40dc879c9a22be978a315c8d079c8c4b6b01b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}