{
  "manageEntity": {
    "action": "Save",
    "entityId": "562479939",
    "entityType": "Track",
    "nonce": "0x602be62bd68e4027ea96794c04a4f7ffbd01dd66cbb3d73b48dc29c328cfbaf2",
    "signature": "0x6d6de094192038808c20ed7a3e2297dcc877749d6ea0b2eeeb9cc02c0e71c4b85a5fbacfa7958ddef5897a92b2e8d96893c475d53ab11b73bdfd245d78740a7b1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}