{
  "manageEntity": {
    "action": "Save",
    "entityId": "153817156",
    "entityType": "Track",
    "nonce": "0xc2d1310a57f6b28fe2375dd82d4610cee23b362c02ae5f17d1c6e7e3e18a4bf8",
    "signature": "0x39ace1fa6b7741893abcfbe33069924993a8ce7904f7d464dfd4adbf608e203e1c96774d17bf6043448a5af21966e463cface73837fb599b1c9dd04eef4065951b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}