{
  "manageEntity": {
    "action": "Save",
    "entityId": "1683906109",
    "entityType": "Track",
    "nonce": "0x346a8e228a06a03abef92e6e6658dbef232e56df0f2ae94bce5e2601370b7435",
    "signature": "0x1589353968f00b990ab533430a89e1edb54853cd3eab1e33ad8c08e8d7ab13386095838991f9cae1556c3616f22a920ca89e1fdb18aa4c9aa8144d7605e973f71b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}