{
  "manageEntity": {
    "action": "Update",
    "entityId": "303777695",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x16fec31b7b1f5d315f72f45a866dbcc7cb54c8eb3c910ada48716192ea3ccc79",
    "signature": "0x3d0cf6d7272d8cfa24cc655db89903bd571fcd4d3bbcc202b5152c7244e3f52c15b24099f3c6d7da72a0fe98cd17afe74e27e94bd64fb68af90f7f63239942ae1b",
    "signer": "0x5621c996698b35698dF806E916C147a18C5c3170",
    "userId": "303777695"
  }
}