{
  "manageEntity": {
    "action": "Save",
    "entityId": "1379881309",
    "entityType": "Track",
    "nonce": "0x9dcd274aa2f86aebd4c828b732de50346a9aa28e42150430b2162b9b0e79fa9a",
    "signature": "0x4af01c69bc9f2494c3698b9c3ae1dc94b00073f70986e78e02adf7c88e7b68ad129454e0bb84ae27e95715b768f0b35b8abdaf211622662fd03f22151bded6e21c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}