{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3c028682a237c0729e1f62c306c47e8f95819b34a99e073a75c6ffef9ea0570e",
    "signature": "0x7716f59fb5814cf5014794bc9ba6735e8b9394d7a21e0d45bb6a0e2bfbed260f4dbcd94ce2151ff54529d1b2f32b933c58ad6230a45b0f2470d0202090cdb6ea1b",
    "signer": "0x95D5f6d03FD9e6Ae11F25Fe683EcA6fC4c0EF026",
    "userId": "689008688"
  }
}