{
  "manageEntity": {
    "action": "Update",
    "entityId": "406716751",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x37d3b5b9f6f465016bccaf3e967a112f215faee053abc0a831566bd20af07cf9",
    "signature": "0x2974ccbec388961d7a6a7930344e758487cf12ca9af9cdc3ceb39ebeb63b1510212cd8f25d944f4738eeabf9af4520f6260524b24343606e21776439bf3fbd7b1c",
    "signer": "0x31eba27Ca105bABB3B8590b9A71b07C6d1e7c747",
    "userId": "406716751"
  }
}