{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe41a2fbb87a787b6973f65b83e57a082279acec6de096f1f73516311d3ecae36",
    "signature": "0x63810ff5cfd2169a9abf8803280fa7976489b2b5ca2f71795d62b481162f8c1d3e96c12313c1b1f83df06ad5f721677d3e33dfbe3516c1748b11d8a411a06e511c",
    "signer": "0x9333fc681dF661803754A168cCaD828c8246dfa3",
    "userId": "305150222"
  }
}