{
  "manageEntity": {
    "action": "Save",
    "entityId": "336811977",
    "entityType": "Track",
    "nonce": "0x658db0c6e2ed7f401f6e16d96c44f587f3608bd6b75d3322594bfb87a286a81f",
    "signature": "0x887f955b2b41572252f9d52cd892d6f0d93109c8a8d71190845cf0523f62c62c692b1c8b0dbceccb1c2a0fa805b8e6af586369a212e0ce9eaadec35a738960821b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}