{
  "manageEntity": {
    "action": "Update",
    "entityId": "573942843",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x7db5f1d329bc6a6675a9f54513991915977fb743a98a1004ff91327b84609790",
    "signature": "0x25765dd749440cd3bc6911f6716dd56966649fc8583a2550691f2b9de35e23582248cd578461bade2a7c55fe6f41a51931a83f44464b868de06cd350521883251b",
    "signer": "0x49F25c2F241269A57684B199d22800Ec4c0f9d57",
    "userId": "573942843"
  }
}