{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbd16f2f091fdbaa2cd364ffb7372b4758e30f5c023694e7f848ef67340d94544",
    "signature": "0xe4af35158db147641b95287a1128fb9e465d7a4d081d51b1701abc21bb8e6d1a49432ce51838724ecab70de7821eea04ecaa80dafcae045678d1efe5cb29405e1c",
    "signer": "0x0aad759fF091935FDA739a94F21294d1b681F4FE",
    "userId": "421631490"
  }
}