{
  "manageEntity": {
    "action": "Update",
    "entityId": "638036736",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xe77ac8410da8a8355cd0abf3e8e295bab6c38f5f6acc778a4aeeee31c42d4009",
    "signature": "0x72cfe3fa3f2f3d87a83680811734d6cc574bdd595d8ce836cd57aabe141a2c5f0f5887850cc3a843a6dfab72934e4f12373fc0ad54e31a367c380232832912601c",
    "signer": "0xC514BF8450eC76F3643255F49FD795ce37847921",
    "userId": "638036736"
  }
}