{
  "manageEntity": {
    "action": "Save",
    "entityId": "13030460",
    "entityType": "Track",
    "nonce": "0x3f3b9985f0f2d3d36c7f7848b564d6a60023ca9193bba0456b2ceb1cd6fa5778",
    "signature": "0x778e24297bce7ebd6454368307c8c998dc3426e5d4d4cf81ef53e854a60307d23c2aa8ab4bbef6e504bce4fdcde01f407c33167f64ca40d650011804a7a47d321c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}