{
  "manageEntity": {
    "action": "Save",
    "entityId": "487525",
    "entityType": "Track",
    "nonce": "0x0f2eb96fae006e03f0a02ca9491843c2305e2997efedf854e632e089c31b61e9",
    "signature": "0xf48b3989d9a3b7d90eacdfb4ddee8a52f29deb147777f1eaadb1f770f772f5765aec6a71c1eb1feb415ae7136b44d505a4d64f3f2ca5bbe4bb718614456096aa1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}