{
  "manageEntity": {
    "action": "Update",
    "entityId": "876735576",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x64fec150dfe74d47e010e5bbdbb24ab7928be152fa31ba5ac184a1a07403a7ab",
    "signature": "0xab9cece5405656a390f042fae4a6b6f3db7743b02191583b1033817d8a9cc38c6764713ed033aa2c402d4440bfe852f4ab87de794d3438b8f4d6c53846545b9d1c",
    "signer": "0x1A03dB80e576Ab52a1E1852ba81778ae8f8f3f95",
    "userId": "876735576"
  }
}