{
  "manageEntity": {
    "action": "Update",
    "entityId": "144702338",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x33aa448ac1e049747364fc67ea613519e827104b77e5579993f3ab472aa4c8f5",
    "signature": "0x822dc4e85fe243edc5d2c06ede075809f366de49aa82a0b83f0455d804b8be4945b08cbe421803761d5ff64f4617fd1d060430f3f44ad3619d8272db230e1dd71b",
    "signer": "0x83D4c5b0035Eb6BBF319Db952dae03e49635aBa2",
    "userId": "144702338"
  }
}