{
  "manageEntity": {
    "action": "Update",
    "entityId": "674976510",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x13f4e9c7cbe197dbb074c4424dbf1e1f0a4565c8916e24fa269682867814b823",
    "signature": "0x300a45bf3fc5246753ce593e2ed5aa94dd091d14da93bb6a4d18f3256489cfad1acd5b6bc8788deb47922c8c2246998157ac5380fd832289335ea841e8cdf0961b",
    "signer": "0x413BB3a0FA5fcAe97e7D8DD593B40ea1500B4a16",
    "userId": "674976510"
  }
}