{
  "manageEntity": {
    "action": "Save",
    "entityId": "873663656",
    "entityType": "Track",
    "nonce": "0x357f5ce417315b09def32554020f1bc0159f1f4d84720c759feae67a18c706cb",
    "signature": "0x8d89e5b986051b1221dcb3924a776e6cae2d8601b4419685f3d4e5c306dff0a30e06bade8804f939d26df44db3af0c294a2dbe9789772016e83ddfe1ee7b3b7b1b",
    "signer": "0x738Fb353b57EdB4d1f33c0049D33b204243db2ad",
    "userId": "693463302"
  }
}