{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5f1fb111f807f2af839ea100ca599866185d1187e73de7e7b37c750e85034a47",
    "signature": "0x1c13d3728d391693f87818934cdab81005f7390653adb7fcd93e09069ac9b4aa57a652f71f235eba19eece542b0443395fc82f831f3e7930221ef9aa3f8088821b",
    "signer": "0xe8BAaf9d67869BFe993951C60524b67BC331bac9",
    "userId": "75683930"
  }
}