{
  "manageEntity": {
    "action": "Save",
    "entityId": "2104612813",
    "entityType": "Track",
    "nonce": "0x8b56449695e9d83d791b58124474a226d03d14655640c24d7ac1888f88b34761",
    "signature": "0x9be20cf8969aa237e957cf3cc3141032d444fbf259005a55cecabfd67aea515460f6e82e47710b794dc12b580148c9799982874782e6087a3985b0de86a922db1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}