{
  "manageEntity": {
    "action": "Save",
    "entityId": "1701873442",
    "entityType": "Track",
    "nonce": "1792407478481542684",
    "signature": "0xa1deb0a42eba4afba267dc1ff7c804833563cff27e2f9cb73c399cb1c3b0ba347a2dc5c22ab66e5ce4d1c699d9ef77567ec1b8a21cdb37e9aa37c730187312f61c",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}