{
  "manageEntity": {
    "action": "Save",
    "entityId": "1689537966",
    "entityType": "Track",
    "nonce": "0xefccca3b7eb72c57c63fabf7ae7eef678a4866f8269eaef74017efee6b4b7f7d",
    "signature": "0xccced101cbbb5cf76d0c7467c6d1d7c34b3bdf1e9a8017e3c490560322651b4c63bbac1435e33253b15c0a8a77017c53197eedc41123b2cf87434b32e9bfb73c1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}