{
  "manageEntity": {
    "action": "Save",
    "entityId": "170160345",
    "entityType": "Track",
    "nonce": "0x188da51c901e3141db0fba730f0e31b716278b5ee7bcb1fba88fcca6a0b420c4",
    "signature": "0x368b248da0c5de7b6e66c77f4b340b058c30c2d4cc071b287f44cdead5eeefc34afb877dce1d615820afbb14538f81de3f6d2be27a04d1fa5b3b44567a982b481c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}