{
  "manageEntity": {
    "action": "Save",
    "entityId": "811411",
    "entityType": "Track",
    "nonce": "0xdcf9641faf05337d1f8439deb4cfbc6c49657edbf56918f64ec97351f721af59",
    "signature": "0xc3b39e223265dc064afabc554bf6db9ab195a136694b15152e6474076099d9b8258b31028ef03dba34cebd01ebb8ec3e03742b2d95739a825062155233199f1e1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}