{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf229bfba3c7f8c14df5cbd9a678af95ae216b37930fe807f628ff249c835cc4c",
    "signature": "0x5d8dba785694cdac7cef68ee8656c60b864deac469e67d26b38c4d4db84b85f53de7540b112ecdd494422a53e3082ffbf85ee1acf52dd50c9da7d7a42428511b1b",
    "signer": "0x17C8533175eEaa722722C320c19e2461180D99Fc",
    "userId": "212435414"
  }
}