{
  "manageEntity": {
    "action": "Update",
    "entityId": "487939004",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraj7nqg76liyg2iahmwoohard3e4du4ksbooxcncumw4svxujtwlaq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1236104233}]}}}",
    "nonce": "0x28ee163c15eff739e10729c160abda6af6d84a7a02107035cbc4a82592ca72d1",
    "signature": "0x7100151c9419f28d196486043c23384879891aafa96a9829d33f5014cd4d21791af9183567f42690c429aad06bb66c0d0aecb2b621138a0dd1161e0fad16e6c71b",
    "signer": "0x3A25162935B033F53f1C057B6EacdFA4472E0400",
    "userId": "487939004"
  }
}