{
  "manageEntity": {
    "action": "Save",
    "entityId": "1775221616",
    "entityType": "Track",
    "nonce": "0xe3848c7ef922eaac43b30a83a02d26568fc628ab39cf05fec434d398d48f3c33",
    "signature": "0xc186dfd183a8562e99164c8a4f837c55c81a7f1938ddb9cb3d03a41500085f4c615e46c9773d34c006cb0f00a0d6159acb44d43e2c12617f2dbeeccef1495f051c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}