{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe9e4ee10ee18440b12bdd3a651f58981bd6c9d6a3b24fb44026c1d3c023e4ebe",
    "signature": "0x8a1984cb2827245b2c7188d1621911491b549d81d3f1fd6fa369d4227ec524bb1bc3b57c7a04c8c8fb0f65468de43a7f1f17e1ed046ac0db46bce9a53de6511f1b",
    "signer": "0x26e5edB5490F2Fa4897626dD634f29302117aa7f",
    "userId": "521699858"
  }
}