{
  "manageEntity": {
    "action": "Update",
    "entityId": "550340113",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xef7b581bf635758980577c9c873b9e52d875bf128b6f0c800f6405ff95233b26",
    "signature": "0x5d0d08e35798d6bb413f690b4cea6a56f875d5a29646726a62764f5b1ef0b3740902a01a00755c52207c99b099a160ad6c7f54982cd93ab3912de7702129239b1c",
    "signer": "0x66c4A758AF5CdCB0E219F5F173De30381B5C594C",
    "userId": "550340113"
  }
}