{
  "manageEntity": {
    "action": "Save",
    "entityId": "958589680",
    "entityType": "Track",
    "nonce": "0x61a67467d9e1d15a1b0c8cd0704d6af2e154c3e53396c2f7953c3a8ebdd572ea",
    "signature": "0x47231c471e7db2b82ff33547cabb746ec575e497c87e01dc2c25ef14b7e31cf548c8f6c3ab9814023d2a4b85026e76f7e0f595765b88abfa7c518996f818f7e71b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}