{
  "manageEntity": {
    "action": "Update",
    "entityId": "554920508",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x8a87765ef933347343d009168274e1d3c9b851c910f828805885388f34e1df3d",
    "signature": "0xc0f9ba7b64e32b2a8586040482eff8a57f54821d56267e75c93427d47c00301128cbb28cb701cea4703f40dfb2d485b28822c04f2daa4bcafabb4c1220bb03771b",
    "signer": "0x989faEfE658E0b6dF1793197b0De4137Cb1aDD3b",
    "userId": "554920508"
  }
}