{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8ec62a4b70b5d0f7dc26df8a3b5b7102eb3aac15f8cdaebfb45a2093f2aa34d9",
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    "signer": "0x7fB94C741b5E1E1E1F6c11Fb6D52e068D0139B8C",
    "userId": "45487140"
  }
}