{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x09c246d5c06295b5375b91c56605b7ab40191315e0023bd950b31c75351abe4e",
    "signature": "0xd4f55473608c1dd082b28bd2b585642830cbfc2a108934aa61d2b72fb4ff917b2cc5fd365344d088dc10ca897ef84eb31a01027755ee4cf89452882784e958981b",
    "signer": "0xCD942117C9d602613ce007099565d7CbF69A1167",
    "userId": "705608357"
  }
}