{
  "manageEntity": {
    "action": "Save",
    "entityId": "51006111",
    "entityType": "Track",
    "nonce": "0xa9954fb9737a1182cf64fd0ee25d39e41f3d4fcede3fc033d07443459ad1423b",
    "signature": "0x15f802d21b3499bcafb8313e705bcee0162d802eaacfa0e721a252fb8951291622db37041d16f9857f8b0186971c73cb5164d59a2f9236641b94bf5c6e09f2971b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}