{
  "manageEntity": {
    "action": "Update",
    "entityId": "187777759",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x921387b21fe0b3930259ae719ae6990f0089d668467f876700b425eeb00812c3",
    "signature": "0xa127239f0c11a093208149e0904c24586881dbb4f2ff02afb6ec0c1e4c4bc7fe4c652bb2983bd89b133cd40ce081c398830a1b835546c91e7a36353d0b146c0c1c",
    "signer": "0x43138Bb0E0DC73645D78d006b44b4833ee194c92",
    "userId": "187777759"
  }
}