{
  "manageEntity": {
    "action": "Save",
    "entityId": "133600",
    "entityType": "Track",
    "nonce": "0x48d7d25bbc5bdf768081a43113b4fa80cf7f05b45b89a8cb358e340e44261114",
    "signature": "0x1b015c549e7d1d37571d8e1a7bbabf46d745726b9da22567ded04e1b1970611c2cf5b9cf3fe298fdb41cceb416e87abbd44a8256a583d776913bd407e21445cf1c",
    "signer": "0x5A2b21D1d4240B0d6eC130512D4b578aec735125",
    "userId": "862976792"
  }
}