{
  "manageEntity": {
    "action": "Save",
    "entityId": "1259038891",
    "entityType": "Track",
    "nonce": "0xa24b37f0163d4801c1df2699b74d6d502ec1cbe0d04e3bb8b968f3d77b501530",
    "signature": "0x58466e9a9fb84585b08d4f7f5264b7f6de752aedbd8b958c85a80b8faca9aa4370dd3ce0db94f436672390e9dfbef9ee00377f442fb9d372763186b09fa6039d1b",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}