{
  "manageEntity": {
    "action": "Save",
    "entityId": "972014295",
    "entityType": "Track",
    "nonce": "0xbe85d4d0ee7b017f2a5bfd844502dc7fcfaf7cb81529c8a1847bac24fc5b391a",
    "signature": "0x542305a99032af501a08adfcb42c70757028f8ff22221b496bfcc6a2f2d94a0d7deb9bb638487d6827c7325781b58f74d280500db05ae2da77dbb5418f5d4bb61c",
    "signer": "0x0E71C12c426F5C9206F778713f48B60477CA943b",
    "userId": "29088079"
  }
}