{
  "manageEntity": {
    "action": "Save",
    "entityId": "1776684172",
    "entityType": "Track",
    "nonce": "0xfbddabd5c109b09ea57a8f074947d188e93945401d191421837e6fb61f967c2a",
    "signature": "0xf6cf83d9ae0c1ff198080c9999d263856bc589cce554fa83e2e62c23be68bbea19d2dbc7727f01ab59200cae6083f87f059676cc483f6e14b92480b86c3d0a791b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}