{
  "manageEntity": {
    "action": "Update",
    "entityId": "643976014",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xe933996c1160cb7fd1cb3f3def89f2b428b42ef82eada508b4c33772fef94452",
    "signature": "0xd351301ea605740ebc8a5f4a19d4e6e90776435d70000a1740e37990f6e74def37c671489b21f0fc475e434bb404b2e02c4b0c419f60e185e228a32f33fd9d1b1b",
    "signer": "0x434E6E903F887d1123e2415651292ED71aC170Eb",
    "userId": "643976014"
  }
}