{
  "manageEntity": {
    "action": "Update",
    "entityId": "507413880",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x4d87ae3f0734278919309ad78873d644cb8b1483e295fa72580e42680cd39908",
    "signature": "0x643dacc2c1df9b1f954bd9a6f75e6bb118bb0553d8553b447a1e9126db857039381bd4bda62aaf9ef07ae463acbbd079288d1b7de12962a187cfce8921686d361c",
    "signer": "0xE6B24340f3279D03154F1f83D702FD1Bfa2351f0",
    "userId": "507413880"
  }
}