{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2784c3d0d6f8e25b9322a1e098a7a5d69654ea4dcd3cfc8b682f690ef3096ccb",
    "signature": "0xca0d703d7d7fc8e924924495909941c95b31111b1d6758aef0541b6741205c6572cf4fea125efe8fa16a181944c9ffeb46c25e6cc08ac262af7876f9aba70ba61c",
    "signer": "0x7dcc9b6c9444AB64901FcbfBdf9b8e585ea37b3F",
    "userId": "752219501"
  }
}