{
  "manageEntity": {
    "action": "Update",
    "entityId": "640804276",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x64191855165601ba1bc3398eefe5d13bba3e7039df7cea206f2794d92190b2d8",
    "signature": "0xd66ab6c14c8a2666ad337559110392d198d574c6ae7e5747f859cb939aef8b7e3874ebbb21e1dac9711d783d267cb1e30c1594f190b6988388fa8e0b9f3a7cb21b",
    "signer": "0x2fff57D5628D87Ce98d02775C9cF63dB765aa6c5",
    "userId": "640804276"
  }
}