{
  "manageEntity": {
    "action": "Save",
    "entityId": "515008838",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xab88a488ead8960a25792d12af462859f98ab61f733da9167bb63d1db87ce96a",
    "signature": "0xfe30f72dece3937dd15b2cf2ff3341a11fb5a81eee822cbc810d4a9cf45b029938710687d106b58509d0e0987894f087831c514062156b54cf44307cae2361871b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}