{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x15a9b95237c55c3bd09d18e88667b6a3a166051b9165ddad69b7721a396c86bd",
    "signature": "0xe152ced3fb4f3299ef7b4e335f0861aa86595afe6601d9009fe0ca3c038ca2323fd79165f86759e7f6b251985f616b0fd0b011402d5e266c6ff725cc9b2767b91b",
    "signer": "0x2C858a7af076b6c49361ce455FD172AcC330cA4e",
    "userId": "956061500"
  }
}