{
  "manageEntity": {
    "action": "Save",
    "entityId": "1657457649",
    "entityType": "Track",
    "nonce": "0xcb1aa27a58a125ff4d82d90c586a9c8d71ba1b86f96806902839b1c492eba4b7",
    "signature": "0xc13f9a58cef4cafcffcd74daecbd49c7eab6dfa37985673da12145cb1bf64b5a5cd38c91924f789a8813a4ea26dd4fef7d49368c4fe3107d149af7cbbc2390261c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}