{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4c42e09d7c10ffb1399632426040b10f3c817cf69bfa5cd67f380ebccb0dc07e",
    "signature": "0xe5701ddebd7685f2b5c70dc36bbf1cfc73b4e1d1ef7cc43cedb12502d9016e5760d2adc191d4b3eee61f9e2283c620eb8526ad6824e484842dc968808512d5f61b",
    "signer": "0x47A457844816531a3A2986e43DACAcA9D3b0465b",
    "userId": "422727299"
  }
}