{
  "manageEntity": {
    "action": "Update",
    "entityId": "779349548",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x21bd786d959519992b92de94aaba66f0c85905e023d66b77b91b313c6766b31b",
    "signature": "0xf5cbc3e6b899c05dd5224119d2da3327aa56a85219a73febc354254a6874b7d6580e823abb9aa61969fb754a8ead6e8379c729e733a30209939dd1d686783a871b",
    "signer": "0x869e31Ef92648a72B2a261859B9cc371910697d6",
    "userId": "779349548"
  }
}