{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xec88073dcad0e5555655ca376f757bdd232b0e2b63869602498c2c0e6db4f8a9",
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    "signer": "0x54d5C666b27904DFA3C076806c46998e5bF8348b",
    "userId": "571162458"
  }
}