{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb45b609bed896801fa3a663e46f1d41df737229c36cf0f4bffcac933dc2fd69b",
    "signature": "0xfbfe290950f8768b05ec72b390bee65cea6fd5294a394b35291b602a353b0ae26f55d43c8a13facb703a86667058134f50a3972decb57cb68109e0e1c2ebf6881b",
    "signer": "0xa74bA38E2215807789c686E33Ade6FB632927C84",
    "userId": "881537377"
  }
}