{
  "manageEntity": {
    "action": "Update",
    "entityId": "738363750",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x3309f839fa4aa7b725dfc21be9000efbfb0ec99f2168ae5c2bd3d34f98fc7fd6",
    "signature": "0x3f3efba0b2f35e64807bdf2d5e0ab6e3c2228b7a7820eae6bffcb8a89878a1505ba9cfbd74ed08f918f0d7a715514cddca8fa3b84cbf18b7682e2b7ca991c82b1c",
    "signer": "0xBB00208e99a2bdf716AB90e9F3C2928A7E512c5d",
    "userId": "738363750"
  }
}