{
  "manageEntity": {
    "action": "Save",
    "entityId": "1962804186",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe4a71b21ee37ad1628bfefc6d2ed6b45bc9edf80606ff2306898c1f0b3183871",
    "signature": "0x6a339f9a8594d77ee6fe09b030064d0711ada67ac911460efeb03248ef60fdee75fbefa7e5fcf7aeb2f1a9052651aef504ae4ca2d22d07ad08f0a6506e7d54421c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}