{
  "manageEntity": {
    "action": "Update",
    "entityId": "640804276",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x361a400ea67e28e708525922420b95129b41aa22c94e71d622725a058551f12d",
    "signature": "0xf0b35c07024f411ec6f65ce8c5e753418c16c66705841bed12be59a605c7ad2865759355e8c911a999cf0577dfde0b97372839ce1bf7cda3178ec62698a5d05f1c",
    "signer": "0x2fff57D5628D87Ce98d02775C9cF63dB765aa6c5",
    "userId": "640804276"
  }
}