{
  "manageEntity": {
    "action": "Save",
    "entityId": "473141711",
    "entityType": "Track",
    "nonce": "0x6b4cfac69f53d1a8d144a345c78faeaff6f87c80d49817d7f59d73cf225e339d",
    "signature": "0xecd65c4482c3fb5ff99d3d1cfe5989c5a4abf1609c952d67cbfbe7354514c9d73760a669c1569ecfd8402783107174b0674baa5965dc765304b69c1190db9e8b1c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}