{
  "manageEntity": {
    "action": "Save",
    "entityId": "490813917",
    "entityType": "Track",
    "nonce": "0xbe80acef78a5122d1bb5bb4eaa4e6179a1c29b098c71bec9fd5dd41b3f8c6b87",
    "signature": "0x8809a8e01ab7f62c00ce08ce5d4814709f68b2b3d052fad6a34a2d93fb238dcd7e0c3951f035548e53ea3ab5edcc3fba815c3dca939631e81ee89d358a6b687c1b",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}