{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3e89cb5ad3c68509f2ef31e3d5be1797211665a24d4538f7342c669ea03c941e",
    "signature": "0xce759ae32c1fe4f4cdf3ce59541d6b019a4368306c2f1a746fe82cc747b5b68d1b6c06bbfabe7d44aa9e0fff0fb97c8d3bebd1e02ac19ea9e5c7542b4f9e89591c",
    "signer": "0x63E1B856BfA0Cfa2BA381C4F59838E153509C163",
    "userId": "553872362"
  }
}