{
  "manageEntity": {
    "action": "Save",
    "entityId": "1175357899",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x310cc2fa699ce2149344c5f65a479aa0b0b0d5f89585c62929064b138a256a8b",
    "signature": "0x4da707dea08c0bec46de41dc97c3fc935790158dbc375ab8bbfe9852c9f904ec0f94334d85e107721f796d7db21e3dd3dd427832d6ee0630117525c552fae21e1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}