{
  "manageEntity": {
    "action": "Save",
    "entityId": "1842990572",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdd15cec2b4d55a9d4cc311ce3c58f4c61661426e5600b30ea24ba8428a4255ee",
    "signature": "0xa4f35a417c3387173a874d503d7c8343d1930a9e05b98d95011d1a141ebf7c9b60cdaff2bcf3b4b37632c59597b54ffd9c057c57f07233c4cd0a0a78c18f3d6f1b",
    "signer": "0x5A6DCd6E22135e4225594900c17114A7dAD01964",
    "userId": "580576096"
  }
}