{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x627e1c2d3da28e69fed6fa05082cdbd723e00fe05a83f0e01496c9f2364a1b1f",
    "signature": "0x95cb778469eccad55c63f2be6c11c0a8f1ba4a7cb7cbd31d9bcc58935150d56f3cc8a7c62ed624e35e5fd5d5651f164b8db027e3164837a6d24a15d25bbe9c521c",
    "signer": "0x1A03dB80e576Ab52a1E1852ba81778ae8f8f3f95",
    "userId": "876735576"
  }
}