{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8c9dc816d38e393f573f4fac8b092056d9292c42a09e6def1112a9169a05f8e6",
    "signature": "0x6075b420a9264d9d39f4ba550d7999a60eabd80a8811f2e822d10cc52b4f4de82e97932be5ad7ba4b43880e422de462aff0f2602bde96e1dd7e4c058fcb217631b",
    "signer": "0xF7805A5AAEA4C2F508Ecf084A2A965f798aaB376",
    "userId": "540925629"
  }
}