{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdc3520abee137190a821d4b187e4db6d594adc243c923813cdd0b25a20db9e0d",
    "signature": "0xd78610b9700e1c516cf44a0013635ded9e345affa1f43e196793a3eac406b52420b0a02ff30aa57ad889ab38d910d22dcccb162c7798b8b90a5c9f4dc92997ed1b",
    "signer": "0xCE911100fDe11b8FaFA48fEE420B61C449239bAE",
    "userId": "235869994"
  }
}