{
  "manageEntity": {
    "action": "Update",
    "entityId": "999611766",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xcaaba57bdb3b1dfb42d7b3d0aec9d3c447d07b50c652873348e919d9a3a7b639",
    "signature": "0x25de3a0125362717752b5c81e14fef793f735e3168c26acaec40213b31efb6d10087a968da3cd8581942ca3c713e3184376fec30a920b353735b2d66fda545681c",
    "signer": "0x1939A5806119BEEF19880a18D9dE98799F7472D9",
    "userId": "999611766"
  }
}