{
  "manageEntity": {
    "action": "Save",
    "entityId": "2115212273",
    "entityType": "Track",
    "nonce": "0x06870ab6038cc95ea66d07b8150195d7b2af932ccc65a05046f9113263805c76",
    "signature": "0xf03d8008ff56a25f43c4d751e888feb657929b8fd1d4058a70d5ff9ce7fb363f628f33c8556312863466ea93240957b560aad2f773be4ff0d36983c7d2abd0301b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}