{
  "manageEntity": {
    "action": "Save",
    "entityId": "1733048236",
    "entityType": "Track",
    "nonce": "0x6b888f6e2b8759784933314ae52709da93e3be95c0a6a011234ab5687357a747",
    "signature": "0x40759a32ef880fc1341f322e4a2ac5e847ced3b1f97a00baf8d28cea6729aa62071ff6bc447b9ea9f2d0c512ad10e30ac3b7c4852abc1641dd18c33fb7158dbe1b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}