{
  "manageEntity": {
    "action": "Save",
    "entityId": "2091547155",
    "entityType": "Track",
    "nonce": "0xeed4a6bde65a0047c1747ae6a0669edaf32356b481a3e846bd4b5cec17a60161",
    "signature": "0x3af706c5abee6c910adb4328ab72f11671fe9ed8277e82ddab8a1c4bb14fec5049863161962028c256d80cd97196cc0227d965963d23cb92f6c8bc7fd6e297851b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}