{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x48cd79a8517c78a05e52d8c91f99319f5979ed0d318e8cd4b1a4fa5e081bf260",
    "signature": "0x67b0d289162af1661d5141af97aea68672bc3f6242fef135c996c20aaff43e2d51b389cdfccbf461ca3c09cfde772645a433425df527f58c4dca655f2424a53d1c",
    "signer": "0x7Ee73be5843A615b1fB410Da95624Bbf08649369",
    "userId": "773010794"
  }
}