{
  "manageEntity": {
    "action": "Update",
    "entityId": "581768610",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieran2xtljgce2fcuadu3e4leei2awwi34cjxi2l263jql6sqvv457xa\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1976376523}]}}}",
    "nonce": "0x3219e1702f3364509d561d1ad8ea64fec7a6b07cbaaa8f6a89b79331c22b01f5",
    "signature": "0x9e891a29358c173f05c0a82c34aa1568d47702aca3a57c6bba1a02ca9f0bdc7a5561b4f70a1517ad82b559a9b59ae8c6b9cc2c77c90553563212924f65a1faeb1b",
    "signer": "0xfFeCa83dB8dF528813049668B3F3f8b38017fc4e",
    "userId": "581768610"
  }
}