{
  "manageEntity": {
    "action": "Update",
    "entityId": "506951677",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x43e6d9f90a1d099fc8f4a32281ea03f15887d0bc06ae6d33a0a5ee9f0e3bf6c3",
    "signature": "0x2adc56a062017490143348e05ca1ae2986220104bf74b984490575304e81b57530fe8247a98f2873bf984d62059b5ad26e7bd5927cce3d9988930991f53d9f1a1c",
    "signer": "0xEF11C1F7894D0278999f55E434AF53a9c51533c9",
    "userId": "506951677"
  }
}