{
  "manageEntity": {
    "action": "Update",
    "entityId": "574972460",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x0a15c947789304ecad6c2983ee88a67b4f27037cec5a54f72cfac2ba8601ddbb",
    "signature": "0xa19212a1d24d6f8f2cda5948cccb248d36369d3e181afe5536f25b55ce537de305451f949602712a5c64e14b1739a9893f8a4472e66a802f4ce0c811f4320ff81c",
    "signer": "0xf6eca2c1CDE9e52553c4636a5999b354714F0493",
    "userId": "574972460"
  }
}