{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x885cb9572584df840143c269550c4b542cceff7773deba7b8d9116b46bb63c10",
    "signature": "0xcf91202abbead9e8c92b50226a5994c71f52243b7c362858d0c1b3ac13b2779a08d8600f4f900eb71e846ecc8f05b809e5b220f43da3410318583526e42fedaf1c",
    "signer": "0x587830d0A35041Ad7B107c79F199D56D616AC56d",
    "userId": "112826780"
  }
}