{
  "manageEntity": {
    "action": "Update",
    "entityId": "640804276",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x2f44cab13a353de05f504febcc96925bb965529556816420e1b554d3f46d6d7b",
    "signature": "0x4c65b3e2b27c7f5fde58ac0feb41f00e4a24bcff04c3651320c4682c8da2c3cc3ce182edfd0a93a241d1667b55e70c640cdba3c5282e80a384b39826161c1f071b",
    "signer": "0x2fff57D5628D87Ce98d02775C9cF63dB765aa6c5",
    "userId": "640804276"
  }
}