{
  "manageEntity": {
    "action": "Save",
    "entityId": "811900410",
    "entityType": "Track",
    "nonce": "0x2238970e12c228f2585edf3dd7ad631ec98dc8acfe6cdb712e64e107ed3e17d1",
    "signature": "0x27722b8fc9544a1077ba062a75ec796e4269730384e046b2569250268058aa6a5a6a4f7cf9847646d46a2f553731bc47bb50211cb31c516ec31072b36c87c00c1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}