{
  "manageEntity": {
    "action": "Save",
    "entityId": "844607953",
    "entityType": "Track",
    "nonce": "0x958007db2fc479d0dd0951de8a45fdb8973700f7fcd2c1c83d89ab6e70cd18cc",
    "signature": "0xf5b278db4bebc6b1e3e49be466b6579de35235c2b7f34aca12a8b2b92c6aa5c6356323f012efc629f4ff800e056448525914f3b5927fc0063946e925caaff8bc1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}