{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa4864868744d631c05dbac6b2ab027193bf0bedf04ea00da127d443bfd7ce4e1",
    "signature": "0x04f67c070ca5e5f2b2cb80fc6feee40ebe03bafda5b13ff2fcd49dfd3d364a2f7a48dce68037c511e52d17bb1779e3755302e15cae2da0e6afddd05ebc5e18001b",
    "signer": "0xa76A435101CDdf0a836F69244eBb64423E43Be61",
    "userId": "814993352"
  }
}