{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe93f9ee654b054a956f138168158a9fa11f847831e322e52ba32555da4f7ebeb",
    "signature": "0x83bb67a41675dab5add02a4d54438ee84743578b0919c8ac8e82cc487df6f9162ee207c611adcf8e21372969682662685331ac2f7ce08ed04d190187a17e1a2e1c",
    "signer": "0xF67346E1E8dea4E9f4a5e2Da7f2586cD4b61ca86",
    "userId": "260593009"
  }
}