{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb67f53cb23b1bcb97b57edd0d10c22ff3d1a74955d6be5776bad8ac36a5c9df0",
    "signature": "0xe63a8ad32e45f2eaf79a3de5f89231406624f255f6fa138d158b4ccb4b1d470e0009d378e3ae3b4dc1c3a7ea18ed28bf1571bf7d54ab3ef828759d31999fcd9e1c",
    "signer": "0x2fff57D5628D87Ce98d02775C9cF63dB765aa6c5",
    "userId": "640804276"
  }
}