{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdcd3d1c22a4bdd63d5e1e42aabc1507d734eca346154e3d05e03abd87546a952",
    "signature": "0x726abb72bd3b991ba1149b8da9da46f0714412586c794d429870213ee8be5e553d5f6065c9c8cab5075f791ac5e8b7ca699ccb44d337395dfc8861a05053aea81c",
    "signer": "0x989b916868600DBE345598dA58094A4216f8103f",
    "userId": "347069473"
  }
}