{
  "manageEntity": {
    "action": "Save",
    "entityId": "541223993",
    "entityType": "Track",
    "nonce": "0x5a58687fb825435980514aa4c9d084c9f913a9666c6c0955f64da4e4034342b3",
    "signature": "0x61f471d1e88b2e488d979c05f371c4ad402db5ddf4b9067409db133b6f1f32c35c58446095548429d678d9c63b52ccc0ce47b4ac9fdda32c3690cf543de35d901b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}