{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x48331496a89f2842c1e916e214e83649d08762c99bd340f18b2606b029329955",
    "signature": "0x5f012af67e38c8387034c653e0c11056dc0e438e94af93b86b90543e0bdf459073647d9ab19262d712f14cb2e083207d74f425a74c3926b4ad7c4136eb098ee01b",
    "signer": "0xE89901B1dEF941e543Cd188f6c8c477A1d165A46",
    "userId": "37781415"
  }
}