{
  "manageEntity": {
    "action": "Save",
    "entityId": "419938333",
    "entityType": "Track",
    "nonce": "0xaec6ad34864638a05b86b8607044ab99c2b4c6fec887228b45dfd537809a4f09",
    "signature": "0x301835b7069aac8ee020c534827c96a4293590faa09003726ccd8d8364c117ba781b8ba10bf7a45ffa9c6e9dac4b0523aa3e28a4c947900fbb11aa0fa17ab3bc1b",
    "signer": "0x6AAB6EaEa3f7F15750b649C269b0391dcB19dEeb",
    "userId": "92019297"
  }
}