{
  "manageEntity": {
    "action": "Save",
    "entityId": "238860948",
    "entityType": "Track",
    "nonce": "0x95d12fb866e7ba62d4f92606fd968a158e5921a60d73ae26bea7ec15efa00d8e",
    "signature": "0x77f7218359b1c64eadf03afef8947340553eb054189e82a41c41f00c8c95e6b37e26c882fba4f27ef95d931beca0c9be01a49bc7b44ffb5c49f2c856dbb787031b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}