{
  "manageEntity": {
    "action": "Save",
    "entityId": "1993009711",
    "entityType": "Track",
    "nonce": "0x258eca9c915e468c1115679b85e5cfa10c87fe0a1cd0ff1151b38112a7d25616",
    "signature": "0x240a38fbe02047d60f33ee2be0dad61ec22834d014717a1f5491dd9cc82befdc34a3f692a66bbc43c291ec28b0250803638d299b8475db3b57fc3492d51b2a521c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}