{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xca286a7a4acd419d4e01db920068e50642b819ee6f4d669855582e0ebd876e52",
    "signature": "0x32301cfe46b922f588555a51e2447768c4ef717bec0e7ae23b3b265c8e1ac6124ebe63b7734d263ea707d2695323bcd40046e9fce1a055f70b11744d76206cae1b",
    "signer": "0x31b9fC615314b35bfCF7e568c00b43D108cfb57f",
    "userId": "867332238"
  }
}