{
  "manageEntity": {
    "action": "Update",
    "entityId": "537522818",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera6jkkc6ito42mnxp6m5k76upylngfegmxb6vlwkkclt2eeqrw6giq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1842718991}]}}}",
    "nonce": "0xf4b739edbc29dd7a73d94ddc85250f72695c54265999e7ba6e4759c8f9dddd94",
    "signature": "0xa237f70833babeefbec689b11323c7c995fc853e053b7449a66df1c6fa90772a2036f78452c5c7c5723a8687f5f848f8d250f13d8ae8b53933f6a75498aa67531c",
    "signer": "0x4489275EDE3B5561263a21082691c922E2c3d2f3",
    "userId": "537522818"
  }
}