{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x79875bdd80ffbd4335ae24d0db132b160ef878051e5f8e01678c11790da998ea",
    "signature": "0x56640251804af6358d66dcce4ef496abb491657b4e4fd1096e0e3a4c1583133e5ee96a2dfc40dd89917f4cc2b1c84055b333571fae11374e41cac6f37d62c6211b",
    "signer": "0xc7328970a3a0E3454728a9f8D6F14ad16F2AA672",
    "userId": "349615440"
  }
}