{
  "manageEntity": {
    "action": "Save",
    "entityId": "1340801964",
    "entityType": "Track",
    "nonce": "0xbe6e1223ac5b4bcc9adb490860c8642b502d5c76e44c2c0c74237e9606789deb",
    "signature": "0x9a9a8e8a8bb4cc88ea3765c3f1593486137993ecd1845f5bdd49360c00c008c879f0a943b68da14c3b43bb593ceb78e099d0f76207f92eb409d9898342766e251c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}