{
  "manageEntity": {
    "action": "Update",
    "entityId": "277121870",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xfa79d92121da39d077e4cc7841d8561444dbf87e31c004f00d365ac04d45e382",
    "signature": "0x3da9cc0cacadd9381303c84e872bec12a99b7ad9617f5c7bde99e6d31f78477313a83651784a33cce51c29a994d33acb301d50d8c9199f90aeba29646d51150e1b",
    "signer": "0x837e31fea20A37Bc9D721378C7c279a5727a2510",
    "userId": "277121870"
  }
}