{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe0ce0f544570b90a1d363b9cd058a6869a976f5fb7c05591c992b23a575142af",
    "signature": "0x23f73f1592e92cd21cff2a6e5ad2a9d9915062582f8fc05e8df5eba3f11dda133e07d2b0e4fb62e0146ee6cd551ce4de391a3cecee0677a104223679afdea98b1b",
    "signer": "0x1f779885d92f15264D7f4EaF616Ac1F3c791b4f0",
    "userId": "723021935"
  }
}