{
  "manageEntity": {
    "action": "Save",
    "entityId": "22261",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa187a1bf54ea12480cf6e8cb1cb3534d0eeaba892ca18f403d3bb6e1973b0d4f",
    "signature": "0x2a574b1a1cadf790b7b7889407caf74430940e87706c98bda76a600913bd5e1461af74121b17abcf82fee2dffcf2f7778e492144206c0689934b1696b82ae4fc1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}