{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbddfce3497f9c7c20521efd116ea2066d89fdda40c7f37d4bb408a3c8740e331",
    "signature": "0xc7b6acc307647c495da7b2ccc1aefcbe35b553ac8e56257655f66e52155c093f48e5b1b8a52c7c16412a0e0b8cfc0c80fe7a03234bde383494b8d0785dfc74ff1b",
    "signer": "0xa85dce385eaA369F6073e0b6e242561d0870425C",
    "userId": "308558165"
  }
}