{
  "manageEntity": {
    "action": "Save",
    "entityId": "219840922",
    "entityType": "Track",
    "nonce": "0xbfe1b9dae47188b76a38ad04e70bbdc95ab265249772cd3976dae5240516e1de",
    "signature": "0x32a38067b9449015f658abd37760d07d6b6a61cdd0429f9cbe982c056f7da1a171c8990ed7e78d6798668724d4177f4f53939ca8015d9cd74de480cfb2bbfe2c1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}