{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6e830f72c34813a63e51b00c6eaf9e71e9ad5a0ced9d2b9602d24efa102d68a1",
    "signature": "0xb992f89dd912574de221136783964625f21c859e86085113cb0ebbc701887ac24b9066cf86778ee01ab199105bd08bf0e8cb9f316915a4118e9866c0d3cfd1171b",
    "signer": "0xDAf93e043ae526Ad91Ac6D967d3a86ad938EB222",
    "userId": "912143328"
  }
}