{
  "manageEntity": {
    "action": "Save",
    "entityId": "518234119",
    "entityType": "Track",
    "nonce": "0x29a67818fbab4c0856b5753da1094fcdb9df2fe6f5b2efc5acf097cdb4b2bfae",
    "signature": "0xcc8ac75420215aedb62e684670d71eb932f0b3848354cc4e5ef80c77c20a74b4236527775c7336e1f8348aef0ae90492962d2f578d5d36e6eca29f08d83c10441c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}