{
  "manageEntity": {
    "action": "Save",
    "entityId": "168428017",
    "entityType": "Track",
    "nonce": "0xbb6a6193afd797cd722647b8cbb8aa68977aa95b788b3be9b81dcca8fecad919",
    "signature": "0x2e2a064eb531c966e9c055f4e869bf6abe21651fd401710ccff6d38681c0d5812db1bc5eb5298dfd0d5c13031f3f0550e59813133822ec37f775efddb7d65acf1c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}