{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0fc291ed1926fb66b83d77188df6b89b5a6b99c554b1f8132d6a923fe1f4715f",
    "signature": "0xe7342aa954b72f4b57b58963f0fab426f272eb92b0c3ab494c06683c55684df1676e422e744949517ab00a184e211ded16f4a096ff18c34d6d8bd05bcb63b4901b",
    "signer": "0xf0FB6Ee8Ad56eA2e147d118ecaa4eB46cf03b448",
    "userId": "831640099"
  }
}