{
  "manageEntity": {
    "action": "Save",
    "entityId": "1995761271",
    "entityType": "Track",
    "nonce": "0x74cb8c2b673643eb4750c5e8eaf634ec975254feff039f4dccc08527a27d914f",
    "signature": "0x47284c1dec2e7ec036645c561756bea2fedf11e8664df02b01031ecd6e3a11c27273f516eb4e9958d32e686edda3f64a365bdde29b6dfd1fc7af4f0d89b2786e1b",
    "signer": "0xA66d5981794A5e084FBD9adBFF28F465924fb9a9",
    "userId": "980224167"
  }
}