{
  "manageEntity": {
    "action": "Save",
    "entityId": "241874416",
    "entityType": "Track",
    "nonce": "0xd0e6d6aa8359e4be505eae0c1fa3be1e13a37d552ad025de985ee713245b51a5",
    "signature": "0x242d1f6607961c98b596e8c1cae70fcf9d28dccad0ccf1e3fe0e00bc0f6cd1f3613efba110915cf20b8c04f54b942e73e6ea6870ba68c7e9bcdc1381ff40438f1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}