{
  "manageEntity": {
    "action": "Update",
    "entityId": "721987098",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xfb137e149eddc74a25dc34f207cb1731fcb0809c83976993bda2e99bf24103e4",
    "signature": "0xcf610436d1eaffac087d9b10bbea2c963247619fc85a542387af6f465a77b2c1544395ce0d74a39058a95447a0145e14e8998645afb05d995a208ad99b8b6fdb1c",
    "signer": "0x4c2B6D597D288449d9F215489E66f1cCe1c85B8F",
    "userId": "721987098"
  }
}