{
  "manageEntity": {
    "action": "Update",
    "entityId": "640804276",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x009a7ea1101bb1afb781366a0224fd028beddf057a521fd8f89befb114f5a9d2",
    "signature": "0xa24aeacfb4c837611a002f5500abf400722cb94c48d347be7a083f7851d2887a5a6d649c6bad565348a47dd35cb7dd54def839c7a1ea5d678e483d001f73dc221c",
    "signer": "0x2fff57D5628D87Ce98d02775C9cF63dB765aa6c5",
    "userId": "640804276"
  }
}