{
  "manageEntity": {
    "action": "Save",
    "entityId": "54757564",
    "entityType": "Track",
    "nonce": "1786723704175669238",
    "signature": "0xf24fb843394f5d422f6b6eaf4553f3f5976e01cc69b689a17be57fca08d55cd65f59ad00554f9c47136cf5739ed49c080cf0871b5973f283f280e38be6ba47841b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}